Yes
The PS3 controller is necessary to do the vocals, but you can play drums and guitars without having a PS3 controller.
Rock Band games on PS2 only support PS2-style guitars and PS2/3 Rock Band guitars and drum kits. Guitar Hero: Aerosmith and newer on PS2 support all instruments from all consoles that the games have note charts for (so no drums on GH:Aerosmith but 360 and PS3 drums work on all full-band GH games).
if your interments are for ps3 and the rock band your getting is for ps3 then yes.
NO...read the boxes of the set(s) it will tell you that drums and guitars are not compatible between PS2 and PS3. Not backwards or forwards, it's a money grab technique
No.
Yes, all rock band instruments work on every rock band game
if you still have the reciept wherever you bought them from if not try game stop or a pawn shop
No, its the other way around. You can play guitar hero with rock band drums on the 360.
No, I don't think so
No, no Guitar Hero instruments are compatible with Rock Band. But, it works the other way around. Guitar hero guitars are compatible with Rock Band. To see the entire chart go here: http://community.guitarhero.com/forums/14/forum_topics/996836
Rock band in its many forms is one of the most popular music related games available today. However, the drums can vary between systems. If you are using an Xbox 360 and your friend has a PS3 you will not be able to use the same drums.
No, but if you don't have a guitar you can only play with the mic. or the drums.