I have a PSP 1000. Can anyone help me with a tree to get to 635PRO-B3. My current CFW is 5.50 GEN-D3. I would appreciate it. I'm trying to update to OFW 6.35 but I get the "system is version 9.90" message. If 635PRO-B3 cannot be installed on the PSP 1000. What is the latest CFW that I can use. I would like to play Dissidia 2. Thank You for your help it's been a year since I've flashed my system.