whats the difference with the remote for a psp slim or the psp thick. cause i need one for my headset but the only have them in in the slim psp.

I don't think the remote changed between the Slim and Regular models.

The Slim is, well, slimmer than the Regular model, it has slightly more RAM - which won't affect game performance - but helps shorten loadtimes and improves the web browser. The speakers are now towards the top of the unit, instead of down where your hands are on the Regular unit. Other than that, everything else is identical between them.