Can you use the big or little clock ?
You have a Merge Paste option and you can set the from position.

It might be easier using the PG Drum kit "Rock Kit.sfz" in Sforzando VSTi and create up the drum track with the piano roll with copy & paste or modify a PG midi drum track.

You can also drag the C:\Program Files\PG Music Inc\Band-in-a-Box Sounds\Programs\Drums\Rock Kit.wav
into RealBand and copy & paste the hits.

Or if you want to add extra hits to a RealDrum add those hits with midi to the track below using Sforzando VSTi, you can use the metronome to add what hits where, then render the 2 tracks to a stereo wav.

Attached Files (Click to download or enlarge) (Only available when you are logged in)
RB-Big-Clock-Merge-Paste.png (314.26 KB, 36 downloads)