To run the mod we are working on in hard drive thread you do not even have to open your psp.
You just plug into the USB port and you are off and running.
We have usb hard drives working
( I have a over a terrabyte that I have plugged in and tested)
Usb card reader and tested over 10 different types of cards
My Ipod in disk mode works just great, I am testing if i can play the music from it
Working on a wifi usb adapter for wireless connection to the PSP
Recompiling remote joystick for the interface