Why don't you just get a Pandora Battery and then get the 5.00 M33 exploited files; and then put those files on a Memory Stick, and then put the MS in the PSP, and then put the PB in the PSP; and finally install 5.00 M33 along with any updates like M33-6 or M33-7 (but I don't know if that M33-7 is real by Dark Alex).

That's the only way to do it; a PB and a MMS. I only recommend M33 because GEN sucks in my opinion. Everything works on 5.00 M33 whether the way it is or a patched version.