Yeah, you can play online, as long as your running the latest ixtreme 3.0 firmware, and your backups are abgx verified, etc. You should be good!
Ok, I have a question. I am a n00b lol and I'm looking into this but there really isn't any straight answers I can find. I want to know if a modded Xbox can play online? Like if I downloaded MW3 on to my drive could I play it on Multiplayer without the disk being in the console(I've scratched some of my games and I'm tired of paying to get them resurfaced) If I can is there a certain set of tools and programs I would need in order to do this, or if someone could do this for me.