Like the other guys, I too run RB, Powertracks, BIAB with no problems. Have only used PG products from the beginning. I use MME and 512 MB Ram with 2.4 proc.
This doesn't help you, I know, but I didn't want to use RB when it came out - I was using PowerTracks.
RTs sealed the deal, and most of what I've learned has been without the manual - so it's pretty user friendly.

What I really like - one click and you can convert all of your tracks to individual files (wavs and mids) for whatever purpose you want.
I still go back and use my PT 12 - I like the fewer bells and whistles.
But I wouldn't work on RTs in any other program - it's just too convenient to be able to regenerate all or parts of different tracks.

Call PG and work your problem - it'll be worth it.

Cheers - Ian

Ian
My "Original Tunes" Site
My gene pool needs more chlorine.