Windows 7 Path環境変数255制限の解決策、SUBST

C:\Users\xxx>subst /?
Associates a path with a drive letter.

SUBST [drive1: [drive2:]path]
SUBST drive1: /D

  drive1:        Specifies a virtual drive to which you want to assign a path.
  [drive2:]path  Specifies a physical drive and path you want to assign to
                 a virtual drive.
  /D             Deletes a substituted (virtual) drive.

Type SUBST with no parameters to display a list of current virtual drives.

C:\Users\xxx>subst L: /d

C:\Users\xxx>subst L: D:\DevPrograms\LuaForWindow5.1_win32

SUBSTはパスを仮想ディスクにマッピングし、pathは短いパスを使用します.　　
 
PS:
Luaウェブサイト:公式サイト:http://www.lua.org/http://code.google.com/p/luaforwindows/ダウンロード:http://luabinaries.sourceforge.net/download.html