Sony usb 2/ 4 / 8 gig hdd drives - Connectivity to psp ?

[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.

Or atleast a UTG copybox.
post like this be made over here - http://www.electronics-lab.com/forum/index.php
As they are more likly to help you without flaming you.
For it to work you would connect as below
PSP > USB CB > USB HD