Will a guitar hero drumset work with rock band?

yes it will but it will only use the kick pedal and the 3 pads and one cymbal, unless they have changed it.

Yes the yellow cymbal will work and all the others will too except the orange.

To fix that you will need to follow this link.

http://www.instructables.com/id/Guitar-Hero-World-Tour-Drum-Mod-for-Rock-Band-2/