http://www.pgmusic.com/tutorial_realdrums_stylemaking.htm
And a couple of tutorials on the BIAB wiki.

There was post in the yahoo groups a while back.
The person there recommended recording your own voice counting the bars so you can see how realdrums are picked.

So I mixed the realdrum with verbal counting in the original .wma
Just a simple, "one" ... "two" ...
at the beginning of each measure
I didn't start verbally counting until after the two lead in bars. This will make a verbal "one" line up with a "1" bar as indicated in the _Style.txt file.

Picking this realdrum with counting you'll hear your voice count out the measure that BIAB selected for the realdrums to play.

When you hear "55", that's the bar in the .wma that is playing.
And where you can put a cymbal roll.
This Really helps to make sense of the _Style.txt file.

One thing is for "shots"/"holds" BIAB will play shot and may then mute the volume. You'll only get like 1 beat of a roll. In the _Style.txt you will likely have to increase the duration. It's field 5 of the hold or shot line.