Just want to throw this out there as I discovered on accident on the dm5.
CHOKE MULTIPLE CYMBALs with only one or more actual choke able cymbals using group2 (I assume the mute groups work in a similar fashion).
After setting up a cymbal (ie crash) to work using a group (I use note 57 with 3-5 gain and a ringy cymbal voice to avoid full on muting) - so far so good....
NOW, run around and assign all of your single zone/no choke cymbal pads OR rims that you want to choke to "group2". The choke strip will work to mute ALL these pads/cymbals!!! In my case, I put both the crash and ride choke strips to this same note and all on group2. I can use either the ride or crash choke strip to mute as many cymbal sound (or whatever)!
There is of course a drawback, but it can be mitigated by understanding the following: as they are all on the same group (dm5 only has 2 groups), the cymbal sounds will "step on each other" and take over the previous sound. In reality, this side effect is minimal through headphone/monitor, though it might pose a more significant issue when recording as the note will be "clipped". In my limited time experimenting with this, the pros far outweigh the cons and if a certain kit/playing style has you banging away on a bunch of cymbals at the same time, pull some that you don't need choking out of the group.