No don't do that, create a folder in your memory stick. In the part which is in (x
depends on what letter your psp drive is put at. Call it "MP_ROOT", inside that folder create another folder called "101MNV01". Put all your psp videos in there, it MUST be in mp4 format or it will not work.
If you still are stuck on how to create the folders, copy everything off your memory stick onto your pc. Then on your psp go to "system settings", then "format memory stick", that will delete everything on it, and put the video folders on. then copy all your stuff back onto your psp.
There is no good, there is no evil, there is only power, and that power will be mine.