Are these games able to be played on the PS3?(I know they should be) and I know they are not in HD although someday i hope they will be.

I was wondering about the guitar controler and wondering if anyone has figured out how to connect it or any other old controlers to the PS3?

The guitar controllers will not work even with an adapter. When you play a PS2 game in a PS3, you have to press the PS button to re-activate the controller. The guitar controllers don't have an equivalent to the PS button and therefore will not work.