THESE ARE ISO/JTAG MODS, THEY WORK ONLINE!
Just replace the two files
360_1.cfg will be your main controls.. Press Dpad Up for No Clip
change your controls to Controller Layout #2 to use God, Give Ammo , Give Cash and No Target( Enemies Can't See You )
Dpad Up - God
Dpad Right - Give 9999 Cash
Dpad Down - Give 999 ammo to all weapons
Dpad Left - No Target (Enemies Can't see you )
Enable what you use to in layout #2 and change back to layout #1.
God Mode will carry over. (just remember after each load to turn it back on. )
Download Link: http://www.megaupload.com/?d=PEXVHWW8
Credit goes to flippo