Kinda a dumb question that's really beginning to annoy me. I'm using a MS Intellimouse Explorer (4 buttons and wheel) and I can't figure out how to map buttons in OS X. For example, I want to map a button to Expose' and then another button (B4) to the "back" function in Camino/Safari. I can't find a way to do both. (The Expose' mapping is easy.) I downloaded the MS software and it only lets me do very specific mappings; I can map B4 to the "back" function in my browser but then I can't do any mappings to Expose' -- MS takes over entirely and I can't free the buttons up to be mapped by OS X. Is there a way to do both? Is there a way to do mappings without having to use the MS software?