How do you add, say a cowbell, or other of the many drum sounds to an existing drum track? Would you go in to Pref/drum kit/ and substitute a playing hi-hat for cowbell, or tambourine? I'm guessing that it would be possible to MIDI only.

Also, should I have BB and RB configured to the same MIDI out? MIDI mapper or MS wave? Because I keep getting this error window thing where it says the midi out is being used by another program, would you like to use an alternate. . . Even though no other program is running?