ok so lets go with a rooted stock ROM. I take no real credit, the credit is jscott30 over on xda. I am just relaying it to you and making it easier.
first download this:
Dev-Host - UCLB3_Unbrick_root_1.1.zip - The Ultimate Free File Hosting / File Sharing Service
now the instructions:
1.) Download and extract the zip package.
2.) Place phone in download mode. Make sure odin is open first, then remove battery, put back in, hold both volume keys in, and plug in usb cord.
3.) If needed, install latest Samsung USB drivers by installing Samsung Kies from HERE. you said you have them. if not install them from
Transfer, Sync & Manage Music, Movies, Photos, Contacts and Calendars with Kies
4.) Open the included Odin exe.
5.) If phone is detected, the window under ID:COM will turn yellow.
6.) Click on "PIT" to browse to and select infuse_gb.pit. Make sure that Re-Partition is selected.
7.) Click on "PDA" to browse to and select PDA_UCLB3.tar.md5.
8.) Click on "PHONE" to browse to and select PHONE_UCLB3.tar.md5.
9.) Click on "Start", and allow Odin to flash the phone. Do not unplug or power off the phone until Odin is finished.
10.) When the Odin dialogue reads "PASS!", the phone should reboot into the stock UCLB3 Setup Wizard.