No, I don't believe so. BFD's artics are selected by their assigned note number, so a pedal isn't going to help you.
Here's an idea, if you're into spending some money:
Get a Midi Solutions Event Processor, and set conditions such that, when the pedal is depressed, note number 38 on channel 10 gets remapped to note number 40. (If so, and if you have the GM note number scheme, depressing the pedal would turn your snare drum hit into a rim shot).
I have one of these units... if you decide you DO want to do it, let me know and I will test to see if this can be done.