CoMeCoCoS just released a set of plugins for Dark_Alex's 2.71 custom firmware. And these are really cool plugins, mind you.  According to CoMeCoCoS himself, you can listen to MP3s, and even take screenshots and videos while you play.

Unicorn over at the DCEmu forums said that installation is really easy: just copy the files to your memory stick, execute Video Plugin for 2.71SE-B'' from Game Menu, and start to capture while playing a commercial game.

There's also a tutorial (albeit in Spanish) made by ciu0ud, which you might find helpful. It's about modifying PSP flash to enable plugins, so if you're new to this stuff, you might want to check it out (and learn Spanish in the process as well).

Download: [SVCapture (Video Capture) + SVCPlayer on 2.71SE-B'']