Plug in the dongle, or cable, then press PS button
you cant play ps3 games on ps2
no.
yes
no
Yes, you can. Just be advised that it has to be for the same exact system.
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yes you can
yes
Sadly you cannot... the makers of guitar hero actually didn't know ps2 was online so they made the ps2 version with no online access.
Plug the mic into the USB ports on the console.
yes simply buy another and hook it up
here is video Tutorial http://escape.ge/photo/ECH90E/ good LUck