Guitar Hero supports both 4-lane and 5-lane drums mode. I assumed it wouldn't be possible to play 5-lane drums in Guitar Hero using the Rock Band cymbals, but then I found these, which claim to work with Guitar Hero.
Is it possible to play 5-lane drums using a Rock Band drumset and the new cymbals?
I think it's unlikely that anything other than Guitar Hero drums will work. I have an Ion kit with three cymbals; it works fine with Rock Band 2 and 3, but shows up as a "normal" 4-color kit in GH: Monsters of Rock.
It's disappointing, because while I greatly prefer the Rock Band series now, I enjoy variety, but I'm not going to buy another kit just to get a better GH experience. (I tried that with a GH guitar to use the slide/tap stuff, and that wasn't really worth it IMHO.)
