I had 100% success by using the DroidX Bootloader and turning USB Debugging OFF when I was using GB. It has been mentioned in many threads that this will work just fine. I don't know what USB Debugging does regarding it, but turning it off (found in the Main Setting Menu under Applications / Development) will allow it to continue to work just fine.
I also found the apk for Droid2 Bootloader in a thread somewhere recently (perhaps even on this site, but it might have been another site too). I think it is similar to Droid2 Bootloader where it was available in the market for $ to support the developer, or it was available outside of the market for free.