We must have a PS3 HDD Driver to read/write files in the PS3 partition in Windows. Then, we only need a ISO to extract files and copy them into the "DEMOS FOLDER".
Example: We have a Resistance ISO and Resistance demo installed...
We can search for the demo in the HDD and copy full game on that folder. What do u think?
Sorry about my english. It's late here and it's difficult for me.