here's another way of cleaning your ps2's vents.use a vacuum cleaner and put it at it's lowest and walla! all the dust is gone.
and for that gameshark problem i've never seen a gameshark for ps2 before but i have action replay and what happend to u happened exactly to me.And what i discovered is that my aaction replay was scratched from inside.So i bought a new one and it worked.
Hope that helps
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