Hello i have a psp iso that is 4gb and my flash drive is only 4gb so it doesn't fit. In order to get it to fit i replaced all the pss files with a small 2b pss file (retaining original names) but when i tried to load it on usb advance i just got a black screen. What could i have done wrong ? and is there some better way to reduce the size? The game i was trying to get to work is Naruto Shipuddin ultimate ninja 4.