Just to be shure I'll use a 512Mb original Sony Memory Stick with Magic Gate support. I'll also flash 3.52 then all the updates 2, 3 and 4, not just 4. I'm hoping that will fix it. Can you tell me your settings in the Recovery Menu to play ISO files(like no-UMD driver, which kernel do you use, which folder do you place your homebrew in, do you use fake region, I'm interested in ALL the settings in the Recovery Menu because I don't know what are they all about so I can't configure them properly).