questions on the ps3.

1)how do u save ps2 games on the ps3 console?

2) can the ddr mat work on teh ps3 console. if not can i use the d pad to play?

3)will the guitar hero 3 guitar work with gh1 and gh2 on the ps3. or will i have to buy a ps2 gutiar and if so will that work on the ps3.

i know of the adapter for controllers on the ps3 however i dont know if it supports accesories.