The "wiped everything" sounds bad, I think you wiped the system when you did this. You were only supposed to wipe cache and dalvik for the installation of the tPak. I think you are going to do the following (it will return you to stock/rooted).:
The following is just an FYI: I had to go back to stock rooted after I had a bad rom install. I used:
R3L3As3Droot And 43V3R Root For The Bionic V2.1 - RootzWiki to flash back to stock rooted with Forever Root hack installed. I followed the instructions below (I just typed this from memory so hopefully I didn't leave anything out. If I did I'm sure others will point out any corrections that need to be made):
1. Extract the zip folder on your computer.
2. Navigate to the R3L3As3Droot folder you just created
3.
ENTER AP FASTBOOT MODE ON YOUR PHONE [Both Vol Dwn and Up Plus Pwr/Scroll Dwn to AP Fastboot/Press Vol up]
4. Plug phone into computer
5. Double click the file
R3L3AS3DRoot.bat for windows,
MotoRooter.sh for Linux, or
Mac-MotoRooter for Mac OS X in the folder.
6. Just follow the instructions on the screen
7. When your phone boots up and the Green Android is asking you to activate your phone, don’t. Instead do the 4 corners = Bypass Activation.
5. Bypass The Activation Screen: touch the top left corner of the screen, then top right, then bottom right, and then bottom left. This will bypass the Android Activation Screen. Then,
9. Set usb mode to Charge Only and then make sure USB Debugging is checked in Settings>Applications>Development
10. Resume following instructions on the computer screen.
Good luck.