I wanted to know how far DivX decoding had come on the PSP because I had never come across a usable player. If you must know, I was looking for a way to view old Power Rangers episodes on my PSP without having to re-encode them. I came across a Korean EBOOT on a database website labelled 'PSP Media Player'. I downloaded it and tried it out. After navigating through some menus I worked out where to put the video files and how to load them. The result is a working AVI player for the PSP.
It works as fully as can be expected. There are some bugs. DivX and Xvid play at full frame rate (25fps/30fps) with fully synchronised sound at 266MHZ. It could possibly play some WMV videos but this takes some trial and error. The MPEG videos seem to work. There is an option to change the clockspeed.
I have redone the main menu to include some English translation of the Korean text which make it usable. I have also written instructions which were not present in the original release.
Remember that I did not write the code for this so I'm not responsible for anything that goes wrong.
P.S. I know this might look like a fake. It isn't. Just Google my coder name "Raydar PSP" and you'll see that I have released software in the past and I'm not interested in messing about.