Now to convert it to a constant tempo for a UserTrack or use in Biab:
Export the the Metronome midi track by dragging the track number to DROP MID.
Drag the Midi into Reaper (Reaper is free to try n try
http://www.reaper.fm/download.php ) import the tempo map of the midi file.
Drag the Drum track into Reaper (and instruments).
Create an Action Hotkey to move to next beat and insert Stretch Marker, Actions > Show Action List > New .
View show Master Track.
Right click on Tempo points > select all
Right click on Tempo points > reset points to zero/center
Highlight from start to end.
Item > Snap Stretch Markers within time selection to grid.
Save Track/s to wav
Now you can bring it in Band in a Box, RealBand or PowerTracks with a constant tempo.