Grand Theft Auto 4 (GTA 4)
As for the save locations themselves, I can shed a little light on that too. By default, with xlive operating normally you will find them:
"installdrive"\Users\"user"\AppData\Local\Rockstar Games\GTA IV\savegames\"randomname"\
That is assuming a windows vista or 7 install (which I believe most of you have now). The windows xp install spot will be in the equivalent "Documents and Settings" directory. "installdrive" is the hard disk to which you installed the game. "user" is your currently logged on user name on which you load and play GTA4. "randomname" is a uniquely generated folder name based on your setup. Also note that "AppData" (or "Documents and Settings" in XP) is hidden in windows by default. You need to make a trip to Folder Options and tick to always show hidden files and folders.
Xlive wrappers/mods may change the save location, and make it more intuitive and readily accessible. If using one of these, you may find you saves moved to "Documents\Rockstar Games" or "Saved Games\Rockstar Games" (again, depending on your operating system). You may need to move out your old saves (from the default xlive spot) to the new location if you wish to use your old saves whilst utilizing the wrapper/mod. Hope that helps a bit
[Edited by PhoenixCH, 11/21/2009 2:56:34 AM]