Scenario: Running 3.03 OE-C, NO PROBLEMS. I decided to upgrade to 3.40 OE-A, and wow do I regret it. None of my ISO's will boot, they all lock up right after the 'PSP' flash. So I just assumed that I had a bad install, so I reinstalled the firmware. Still having the same problems... So from here, I reinstalled 3.03 OE-C. Still shitting itself for loading ISOs. Mind you, homebrew apps run just fine. So I downgraded from OE-C to 1.50, and then back up to 3.03 OE-C. Still giving me problems. I have no idea what's going on. The ISOs are in /ISO, I have a UMD in, and I have No UMD disabled. I don't know what's going on, but I am beyond frustrated.