The only PRX that records your screen is Remotejoy. And I can never get it to work in-game. Only in the XMB.

But, there are PRXs that take screenshots.

I don't know what you mean by 'capture'. I know what it means, but I don't know how you are using it. As a screenshot, or a recorder???

If you want to record, use Custom Firmware Extender 3.1. (I can only get it to work in the XMB, not in-game)
Get it here: http://dl.qj.net/Custom-Firmware-Ext...5518/catid/151

If you want to take screenshots, DON'T use NitePR's Screenshot thingy.
Use FuSaScreenShot.prx.
Get it here: http://www.consolediscussions.com/fo...ot-prx-t14100/