Here's how I do it:
http://www.nortonmusic.com/backing_tracks.html

I use Master Tracks Pro instead of RB as my sequencer, but you would be able to do the same with RB.

Insights and incites by Notes


Bob "Notes" Norton smile Norton Music
https://www.nortonmusic.com

100% MIDI Super-Styles recorded by live, pro, studio musicians for a live groove
& Fake Disks for MIDI and/or RealTracks