Ok, I have been combing the threads and I realized it would take forever so I'm just gonna ask. But, first, you need to know my situation so here it is: 1. Original 1.5 PSP of 2or3+ years breaks. 2. Exchange it at Costco(excellent return policy, even made money because of getting back full paid price then paying the lower current price) and get a factory 2.5 3. Asks this question. Now, the question. How do I tell if its a TA-82 and whats the safest downgrader I can use? Could I just upgrade to some type of OE firmware or do I have to downgrade first? Thanks in advance and please, only comments from people that have experience and have done this before. EDIT- BTW, I dont have GTA so I would like a non GTA downgrader but I can go find a 2.0 update GTA version if I have to.