U can use xilisoft video convertor for the psp, which will convert it to mp4 format with a file that is a little bit bigger then the original... remember that mp4 is an other way of coding which is normally bigger.... and with almost everything you convert there is losing quality.. but with that program it can be done.... there are many psp video converting software but I use xilisoft(is fast) and image converter for sony palmtops which also can convert to mp4 video