Our new drummer just came down with a severe hernia. He won't be playing for some time and we as a band want to continue building the new show. So now I'm trying to replace the drummer with BiaB (temporarily ofcourse )

As I was creating the drumtracks using preferrably RealDrums, I had the need to have multiple drumstyles available at the same time. For example: I needed a count-in, after that 7 bars of click, one bar of shots and then the normal drumparts. The count-in, the shots and the normal drumparts are no problem. But for the 7 bars of click I wanted to create a simple drumstyle (MIDI) with just closed high-hat on every beat. Assigning that drumstyle to, say, the guitartrack would make me able to play that part for the first 7 bars and then mute that track.

I also want to have a rockdrumsstyle playing while at some points in the song some extra percussion added.

So what I basicly want is have drums (RD and/or MIDI) assigned to the instrument tracks (guitar, bass etc). But I can't find any way to do this. I read some post of forummembers who use RD's alongside with MIDI-drumparts, so it should be possible do this. But how?
I usually do these things in my DAW. But for band rehearsel purposes I want to use only BiaB. Any help would be greatly apreciated!