I had the same issue. I ran the unlagfixme.bat, it said to allow root access on the phone. I waited, and the phone never asked for root access. The LP went in to a force close loop. Pulled the battery, restarted, stuck at the Verizon splash screen.
I just did a clockwork nandroid backup. I'm trying to do a restore. I hope it works.
So, how do you remove the lag fix? It appears I'm not the only one who has problems. Do I need to mount the SD card? Sprinkle it with Holy water? Wait for a new ROM? Assuming I didn't brick the phone, of course.