I tried it but even when you change it to midi drums and then a Custom Preset it still plays the drums of the current style.
If you select a Mel or Sol track and add a custom drum preset to those I get nothing.
If i change anther track to a custom midi preset other than Drums it works.

I added a preset to CustomMIDIPResets.txt
Bass, Fast Bebop Jazz A-B Sw 300 Any$Bop_300$bass$33
Drums, Fast Bebop Jazz A-B Sw 300 Any$Bop_300$drums$41
and it will show up in the preset list,
I can get it to generate the Bebop Bass in another track.