I don't have a drummer, so I've gotten used to playing with the midi thing a little bit...try this for multitracking the drums...
If you're using triggers and recording the trigger clicks as a midi file or even writing out each drum hit by hand in a midi file, some programs like Cakewalk have a CAL to Split Note to Tracks. This is a great thing. You select the drum midi track, run the Split Note to Tracks CAL on it, and each drum and cymbal suddenly has it's own track you can solo out and record individually into your multitrack recorder.
Then it's just a matter of resynching the tracks, and doing your stuff to each drum...
One big downside...you have to listen to the song all the way through listening to each drum being hit, and it sounds weird, and takes freakin' forever. But you get really clean, isolated drums that you can repan, remix, compress, and do whatever you'd like without messing with the other individual drum tracks.
I always use an 8 count of click track on each track for resynching the tracks.