I sincerely wonder what happened to his system in the first place - Sleep Mode is dead hardware-wise and software-wise, applications randomly die, firmware updates are rejected... His PSP clearly cought a cold....
EDIT: Merrit, one more question - do you have a twin-SD adapter? If so, have you attempted using *only one slot at a time* before? Some issues I had with plugins were fixed by doing that when I was using a counterfeit adapter. Remember that removing either SD will cause your data to become unreadable, so create a backup.