I installed 3.9 & both BBs over 3.1. I have a PicassoIV &
use P96 v2. After installing BB2, my system would not boot.
I ended up replacing Devs:AmigaOS ROM Update & C:Setpatch
in BB2 with the ones from BB1 & all was well. The BBS don't
mess with the gfx card drivers, but it does mess with the scsi buss.