I have followed all the instructions on posting for "Universal Unbricker V3 Easy Installer using FAT/SLIM 1.50/Custom Firmware PSP" and when I put the pandora's battery into the PSP SLIM with 3.60 sony firmware & in the PSP Fat with 3.52 Sony Firmware, The green light comes on but it doesn't boot into any menu or anything to give me an option to install, just keeps the black screen. I have a PSP Slim with 3.71 M33-2 Firmware which I created the Magic Memory Stick with. I also created the Pandora's Battery in the same PSP. I used Win xp to create the Magic Memory Stick with the Easy Installer. I have tried magic the MMS on a second Memory Stick Duo in case the first was faulty. The Pandora Battery was made with my PSP SLIM that has the 3.71 M33-2 Firmware. When creating the Pandora Battery I followed the instructions exactly on the section "PANDORA GUIDE: THOSE THAT HAVE CUSTOM FIRMWARE PSP" Anyone can offer any assistance would be appreciated.