JiNxEd04

Apparently sony have brought out 4 differnt versions of the psp since it's inception, in order to stop the use of people installing games via preloaded sources. My Intention Now I have Sony usb 2/4/8 gig hdd drives which I intend to pre-install around 30 games a piece. My Questions Ideally I would like to connect these drives to all versions of the psp regardless of firmware, via usb. Is this possible or will I require an external interface and power supply, Interface designs, pcb schematics, coding, idea's are all very welcome. If anyone has ideas could you please leave me links to the relevent information or leave a message, email I will reply asap. I tried another board as was directed here.