Shadow and the rest of the JPCSP Team have released a new version of their PSP Emulator for Windows written in Java, heres whats new:

Masks the light mode and shade model values so they send a proper value that doesn't overflow any array (as seen in LocoRoco)
Changes to bad matrix upload to just a log as it causes some problems in games

http://buildbot.orphis.net/jpcsp/