So I read all the tutorials and did a vast search of the whole database. and Yes, I did find some answers. but I'm even more confused now then when I started this venture.... I have a brand new PSP(9/30/07 purchase) its version "K" Above the barcode (which is ver 2.00 or higher on the tutorial here). I DL'd some games one is an ISO the other is a CSO. I put them both in the I:\PSP\ dir and the I:\PSP\ISO and ever other DIR that was recomended... so here is my question, and I'f I'm just stupid, then by all means flame on... 1) Do I need to Downgrade my firmware to 1.5 to use the ISO/CSO files? 2) Will the UMB Emulator (and others like it) work on my ver (3.0 or 3.5, I have no idea) to run the ISO/CSO. As you can see they are basic questions. but I'm so confused any (1st grader level) help would be most appreciated. Thanks all! Flame on!