To see if you are on gb then go to settings > about phone > and see what android version you are on. If it is 2.3.3 then it is gb; however when installed the monster file I believe I got the normal droid 2 boot animation (but im not 100% sure). In regards to the tbh sbf, I tried it b/c I didn't want to have to sbf with my cpu; however it failed at the radio installing. Some have got it to work and others have been unable to. I ended up having to sbf with my pc after trying to install it.
Droid 2 Liberty GB v0.9 Gingercomb Juiced