(adsbygoogle = window.adsbygoogle || []).push({}); is it possible to put a modified patch on mw2 (on ps3 fw 4.00) with backup or sumthing?
If so, how does it work?

No. :carling:

No :lol:. There's a way where you can hook up your hard drive to you're PC with a SATA Cable, but I doubt you'll understand it, and won't get it to work like thousands of others :p

no only way you could host is if you downgrade by a e3flasher or progskeet or had 2 ps3s 1 on 4.00 and other on 3.55cfw