I have some games that are extension .mdf I load them in a virtual drive with Alcohol and use UltraISO to create and ISO file with. When I then convert them with popstation everything seems fine until I try to actually play it on the PSP and then nothing happens. I can get to the very first screen but it will never go to the second screen showing the PS logo. I have tried three different games all with the same results. What am I doing wrong in the UltraISO conversion? Thanks for the help.