Try and open your song.SGU with Realband
click down the bottom on Metronome button
set beat 1,2,3,4 to the drum and velocity level you need
click Write to Track
mute the existing drum track

Another way, the piano roll window to the side of the metronome window I just manually edited the beats from JAZQUINT drums, then you can just copy n paste them along the track.

I could make a usertrack up for you but I think the above would be the easiest way.

There is a lot of helpful info on drums on this site http://www.realband.org/tutorial-utd.html

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