I made some flashcards for the PSP written in LUA, there is a readme text that shows how to use it.
Please be careful, it needs to copy about 6350 files, and I don't know if that is harmful for the memory stick, it's just a warning, if somebody knows if it is true, please tell me.
(you will need about 50 mb of free space, the files take 15, but the extra is for the FAT)
http://www.megaupload.com/?d=LSLOHUE5