I tried going to a backup rom and now its STUCK on Samsung start up screen. I don't know how to get it to do anything else. Please, someone help.
Did you wipe anything before doing the restore?
Okay so you are in Download Mode which is used for Odin. Odin is recognizing your device which is awesome.
You need to locate the Odin tar files to restore to factory stock for the Infuse and flash and you should be out of trouble and on your way.
Edit/Update: Here is the thread we have with the Odin instructions and files...
http://forums.androidcentral.com/in...-samsung-infuse-4g-mega-thread-tutorials.html