no the disc wont work
No. If the controller is for the PS2, it will ONLY work with that console, just like a regular controller.
Nope, you can't play a ps3 guitar in a ps2, but if your ps2 guitar gets inserted in the USB port then you can play it on your ps3.
You can not because that would be using PlayStation Controls on a Nintendo Console.
Yes that's why is says PS2
yes as long its the same console
No it can not
no
No PS3 games do not work on PS2.
Once again...NO
No, you can't use controllers between different consoles, but only with the same console. So you can use Guitar Hero PS2 controllers with Rock Band PS2, but not Wii.
no a PS2 can not play a PS3 game
Yup :)