这个东西可能会很实用~转自国外网站

自己

Main features:
* complete replacement of the xlive.dll (original dll isn't required)
* all online functions are disabled (to prevent cheating in multiplayer)
* removed all anti-debugger checks
* all game variables are made unprotected and can be accessed and changed by the trainers, control centers and other tools
* in-built asi-loader (no need to replace original files)
* asi-loader searches for .asi files in the root game folder and .asi and .dll in the 'plugins' folder

Additional features for GTA IV version 1.0.1:
* removed savefile check (you can load save file made by any offline XLive user)
* removed files.txt check (integrated replacement of FileCheckFix and MagicPatch)
* restored access to the system debugger in the critical error menu (removed loading of WER.dll)
* enabled write access to memory in code and .rdata segments (no need to call VirtualProtect from a .asi)
* disabled RGSC
* moved 'savegames' folder (see below).

Installation:
* unpack the file xlive.dll into the game folder (don't forget to remove the asi loader if there is one)
* to turn on debug logging, unpack the file xlive_d.dll into the game folder and rename it to xlive.dll

Additional notes on savefiles:
* savefiles are now located in the folder:
(for Windows Vista) %USERPROFILE%\Documents\Rockstar Games\GTA IV\savegames\
(for Windows XP) %USERPROFILE%\My Documents\Rockstar Games\GTA IV\savegames\
NOTE: don't forget to copy savegames to the new location

Plugin support:
* Added plugin API (xliveless.h and xlive.lib)
* Added sample plugin that moves the 'savegames' folder into the game folder (saveToGameFolder.dll)

Known bugs:
* If you select "Live Guide" in the game menu, game will hang.

Download:  http://public.sannybuilder.com/GTA4/xliveless-0.93.rar

可以实现在线用户读取线下用户的存档~~还有很多功能~~~