ChickHEN

OK back a few weeks ago I had 4.02 and upgraded to 5.03 and used ChickHEN R2 and it worked for the first time but the second time it didn’t. So I also wanted to use the PlayStation Store to get some demos and themes but oculdn’t access it and just decided to upgrade to 5.05 since I didn’t think about ChickHEN as being worth it since it only runs homebrew (I understand why) and thought R3 will work on 5.05 wit the new security hole thingy on 5.05. But recently custom firmware released for the PSP-3000 and it only works via using ChickHEN (R2 and up) and R3s not released yet (and might not work on 5.05) and R2 only works on 5.03. So how do I downgrade my PSP-3000 from 5.05 to 5.03 or run ChickHEN R2 (and if any available later version) on 5.05?

I have a lot of ISO and CSO games here and I own them legally…. I backed them up so if I lose my UMD I can still play my games using a Memory Stick PRO Duo plus it runs faster since Memory Stick PRO Duo write and read speeds are way faster than UMD. Also I was wondering how do I recover a wet PSP battery (The Slim model) my brother happened to have left it in the car and the battery got wet and it worked for a while then stopped working. I was going to get it fixed by Sony for free (saying I received it like that) but I opened it and they might in most cases not believe me. When I charge it the orange LED blinks once every second or two