Shoot. I tried it and it doesn't work. What I don't get is that part where I can "select the track name" that I want in step #5 that you mention. I can change the real drums, but not anything else.

So...
My chart looks like this:

Measures #1-47: Bossa
Measure 48-55: Solo section: Swing
Measures 64 to end: outtro.

I tried the J_Dolfin style, and I get the drums going from bossa to swing, but the real bass plays this lame pedal. I want the cool real tracks walking bass to come back.

What I would like is:

Measures #1-47: Drums: terryclarke bossa + Bass 464 (bossa ev 8)
Measure 48-55: Terryclarke jazz drums + real tracks swing bass (Bass #443)
Measures 64 to end: back to first feel

This tune is for my piano/sax duo, so I don't care what the rest of the band is doing.
Is this possible?