diff --git a/bin/prepare_steam b/bin/prepare_steam
new file mode 100755
index 0000000..c0da4ec
--- /dev/null
+++ b/bin/prepare_steam
@@ -0,0 +1,120 @@
+#!/usr/bin/python
+# Use Steam with external HDDs
+# (c) 2015 Taeyeon Mori CC-BY-SA
+
+import sys
+import os
+import argparse
+import posixpath
+import ntpath
+
+import vdfparser
+
+
+CONFIG = os.path.expanduser("~/.files/etc/prepare_steam.vdf")
+
+
+def parse_args(argv):
+    parser = argparse.ArgumentParser(prog=argv[0])
+    parser.add_argument("-p", "--platform", "--profile", default=sys.platform, help="Platform profile (%(default)s)")
+    parser.add_argument("--config", default=CONFIG, help="Use alternate config file")
+    return parser.parse_args(argv[1:])
+
+
+def take_sorted_list(dct, pred):
+    keys = list(filter(pred, dct.keys()))
+    lst = [dct[k] for k in sorted(keys)]
+    for k in keys:
+        del dct[k]
+    return lst
+
+
+def detect_steam_platformpath(steamroot):
+    if os.path.exists(os.path.join(steamroot, "Steam.exe")):
+        return ntpath
+    else:
+        return posixpath
+
+
+def main(argv):
+    args = parse_args(argv)
+    
+    vdf = vdfparser.VdfParser()
+    
+    with open(args.config) as f:
+        config = vdf.parse(f)
+    
+    profile = config[args.platform]
+    steamroot = os.path.expanduser(profile["steamroot"])
+    
+    # Read steam libraryfolders.vdf
+    libsvdf = os.path.join(steamroot, "steamapps", "libraryfolders.vdf")
+    
+    with open(libsvdf) as f:
+        libs_config = vdf.parse(f)
+    
+    library_folders = take_sorted_list(libs_config["LibraryFolders"], str.isdigit)
+    
+    # Read steam config.vdf
+    steamvdf = os.path.join(steamroot, "config", "config.vdf")
+
+    with open(steamvdf) as f:
+        steam_config = vdf.parse(f)
+
+    client_config = steam_config["InstallConfigStore"]["Software"]["Valve"]["Steam"]
+    
+    take_sorted_list(client_config, lambda k: k.startswith("BaseInstallFolder_"))
+
+    # Fix Library Folders
+    steampath = detect_steam_platformpath(steamroot)
+    do_normpath = profile.get("SanitizeLibraryPaths", "1") != "0"
+    
+    if do_normpath:
+        orig_library_folders = library_folders
+        library_folders = []
+
+        for f in orig_library_folders:
+            f = steampath.normpath(f)
+            if f not in library_folders:
+                library_folders.append(f)
+
+    for path, steam_path in profile.get("Libraries", {}).items():
+        if not steampath:
+            steam_path = path
+
+        if do_normpath:
+            steam_path = steampath.normpath(steam_path)
+
+        if os.path.exists(path):
+            if steam_path not in library_folders:
+                library_folders.append(steam_path)
+                print ("Added Library Folder at %s%s" % (path, (" (%s)" % steam_path) if steam_path != path else ""))
+        elif steam_path in library_folders:
+            print ("Removing unavailable Library Folder %s" % steam_path)
+            library_folders.remove(steam_path)
+    
+    for path in profile.get("LibraryBlacklist", {}).values():
+        if path in library_folders:
+            print ("Removing blacklisted Library Folder %s" % path)
+            library_folders.remove(path)
+
+    for i, path in enumerate(library_folders):
+        libs_config["LibraryFolders"][str(i + 1)] = path
+        client_config["BaseInstallFolder_%i" % (i + 1)] = path
+
+    print("Available Libraries: %s" % ("\"%s\"" % "\", \"".join(library_folders)) if library_folders else "(none)")
+
+    # Save new vdfs
+    os.rename(libsvdf, libsvdf + ".bak")
+    with open(libsvdf, "w") as f:
+        vdf.write(f, libs_config)
+
+    os.rename(steamvdf, steamvdf + ".bak")
+    with open(steamvdf, "w") as f:
+        vdf.write(f, steam_config)
+    
+    return 0
+
+
+if __name__ == "__main__":
+    sys.exit(main(sys.argv))
diff --git a/etc/prepare_steam.vdf b/etc/prepare_steam.vdf
new file mode 100644
index 0000000..6a6e166
--- /dev/null
+++ b/etc/prepare_steam.vdf
@@ -0,0 +1,38 @@
+// prepare_steam config file
+// In Valve VDF format
+// Top-level keys are platform profiles (-p/--platform/--profile)
+"linux"
+{
+    // Steam Install path
+    "steamroot" "~/.local/share/Steam/"
+    // Allow prepare_steam to sanitize library paths?
+    //"SanitizeLibraryPaths" "1"
+    // Libraries that prepare_steam should manage
+    "Libraries"
+    {
+        // "Actual Path" "Path to tell Steam"
+        // The latter may be empty, in which case the former is used
+        "/media/Data/SteamLibrary" ""
+        "/media/DumpStore/Steam/Library" ""
+    }
+    // Library folders that shouldn't be used by this profile
+    "LibraryBlacklist"
+    {
+        // "whatever" "Path Steam shouldn't use"
+        // The former value doesn't matter, must however be unique
+        "0" "/media/DumpStore/Steam/Windows Library"
+    }
+}
+"wine32"
+{
+    "steamroot" "~/.local/share/wineprefixes/Steam32/drive_c/Program Files/Steam/"
+    "Libraries"
+    {
+        "/media/Data/SteamLibrary" "E:\\SteamLibrary"
+        "/media/DumpStore/Steam/Windows Library" "F:\\Steam\\Windows Library"
+    }
+    "LibraryBlacklist"
+    {
+        "0" "F:\\Steam\\Library"
+    }
+}
\ No newline at end of file
diff --git a/lib/python/vdfparser.py b/lib/python/vdfparser.py
new file mode 100644
index 0000000..0ce4a35
--- /dev/null
+++ b/lib/python/vdfparser.py
@@ -0,0 +1,174 @@
+#!/usr/bin/python
+# Parse Steam/Source VDF Files
+# Reference: https://developer.valvesoftware.com/wiki/KeyValues#File_Format
+# (c) 2015 Taeyeon Mori; CC-BY-SA
+
+from __future__ import unicode_literals
+
+import io
+
+
+class VdfParser:
+    """
+    Simple Steam/Source VDF parser
+    """
+    # Special Characters
+    quote_char = "\""
+    escape_char = "\\"
+    begin_char = "{"
+    end_char = "}"
+    whitespace_chars = " \t\n"
+    comment_char = "/"
+    newline_char = "\n"
+    
+    def __init__(self, *, encoding=False, factory=dict, strict=True):
+        """
+        @brief Construct a VdfParser instance
+        @param encoding Encoding for bytes operations. Pass None to use unicode strings
+        @param factory A factory function creating a mapping type from an iterable of key/value tuples.
+        """
+        self.encoding = encoding
+        if encoding:
+            self.empty_string   = self.empty_string.encode(encoding)
+            self.quote_char     = self.quote_char.encode(encoding)
+            self.escape_char    = self.escape_char.encode(encoding)
+            self.begin_char     = self.begin_char.encode(encoding)
+            self.end_char       = self.end_char.encode(encoding)
+            self.whitespace_chars = self.whitespace_chars.encode(encoding)
+            self.comment_char   = self.comment_char.encode(encoding)
+            self.newline_char   = self.newline_char.encode(encoding)
+        self.factory = factory
+        self.strict = strict
+
+    def _make_map(self, tokens):
+        return self.factory(zip(tokens[::2], tokens[1::2]))
+
+    def _parse_map(self, fd, inner=False):
+        tokens = []
+        current = []
+        escape = False
+        quoted = False
+        comment = False
+
+        if self.encoding:
+            make_string = b"".join
+        else:
+            make_string = "".join
+
+        def finish(override=False):
+            if current or override:
+                tokens.append(make_string(current))
+                current.clear()
+
+        while True:
+            c = fd.read(1)
+            
+            if not c:
+                finish()
+                if len(tokens) / 2 != len(tokens) // 2:
+                    raise ValueError("Unexpected EOF: Last pair incomplete")
+                elif self.strict and (escape or quoted or inner):
+                    raise ValueError("Unexpected EOF: EOF encountered while not processing outermost mapping")
+                return self._make_map(tokens)
+            
+            if escape:
+                current.append(c)
+                escape = False
+
+            elif quoted:
+                if c == self.escape_char:
+                    escape = True
+                elif c == self.quote_char:
+                    quoted = False
+                    finish(override=True)
+                else:
+                    current.append(c)
+            
+            elif comment:
+                if c == self.newline_char:
+                    comment = False
+            
+            else:
+                if c == self.escape_char:
+                    escape = True
+                elif c == self.begin_char:
+                    finish()
+                    if len(tokens) / 2 == len(tokens) // 2 and (self.strict or self.factory == dict):
+                        raise ValueError("Sub-dictionary cannot be a key")
+                    tokens.append(self._parse_map(fd, True))
+                elif c == self.end_char:
+                    finish()
+                    if len(tokens) / 2 != len(tokens) // 2:
+                        raise ValueError("Unexpected close: Missing last value (Unbalanced tokens)")
+                    return self._make_map(tokens)
+                elif c in self.whitespace_chars:
+                    finish()
+                elif c == self.quote_char:
+                    finish()
+                    quoted = True
+                elif c == self.comment_char and current and current[-1] == self.comment_char:
+                    del current[-1]
+                    finish()
+                    comment = True
+                else:
+                    current.append(c)
+
+    def parse(self, fd):
+        """
+        Parse a VDF file into a python dictionary
+        """
+        return self._parse_map(fd)
+
+    def parse_string(self, content):
+        """
+        Parse the content of a VDF file
+        """
+        if self.encoding:
+            return self.parse(io.BytesIO(content))
+        else:
+            return self.parse(io.StringIO(content))
+    
+    def _make_literal(self, lit):
+        # TODO
+        return "\"%s\"" % (str(lit).replace("\\", "\\\\").replace("\"", "\\\""))
+    
+    def _write_map(self, fd, dictionary, indent):
+        if indent is None:
+            def write(str=None, i=False, d=False, nl=False):
+                if str:
+                    fd.write(str)
+                if delim:
+                    fd.write(" ")
+        
+        else:
+            def write(str=None, i=False, d=False, nl=False):
+                if not str and nl:
+                    fd.write("\n")
+                else:
+                    if i:
+                        fd.write("\t" * indent)
+                    if str:
+                        fd.write(str)
+                    if nl:
+                        fd.write("\n")
+                    elif d:
+                        fd.write("\t\t")
+        
+        for k, v in dictionary.items():
+            if isinstance(v, dict):
+                write(self._make_literal(k), i=1, d=1, nl=1)
+                write("{", i=1, nl=1)
+                self._write_map(fd, v, indent + 1 if indent is not None else None)
+                write("}", i=1)
+            else:
+                write(self._make_literal(k), i=1, d=1)
+                write(self._make_literal(v))
+            write(d=1, nl=1)
+    
+    def write(self, fd, dictionary, *, pretty=True):
+        """
+        Write a dictionary to a file in VDF format
+        """
+        if self.encoding:
+            raise NotImplementedError("Writing in binary mode is not implemented yet.") # TODO (maybe)
+        self._write_map(fd, dictionary, 0 if pretty else None)