What you need: 2 USB's, modded CoD5 .GPD, 2 accounts(main and silver). CoD5 Disc.
1. Put silver account on USB 1 make sure cache is cleared
2. Put the USB 1 into your Computer and put the GPD made by TTL Gaming on it
3. Put the USB 1 back into your Xbox and keep it as normal, now go on Split Screen and sign into silver account on a controller and sign into main account on USB 2.
4. Infect yourself and unplug USB 2 with main account and put -Zombie- GPD on it.
5. Now go onto Xbox signed in to main account with -Zombie- GPD on it and unplug USB 1.
6. Connect to Xbox Live and go into a private match.

Downloads:
Will Be Released Soon

+REP IF HELPED