I just found this Great forum!!!
I just got a psp 2.6 from amazon UK, motherboard got IC6001 but I don't see IC1003 so I think it is not a TA082/3? I want to change my psp to 3.02/3.03 oe or higher, I have been searching online for solution, as a result, I just want to confirm whether I got the correct solution:
1. upgrade my 2.6 psp to 2.71 using official pack
2. downgrade from 2.71 to 1.5 in one step
3. upgrade from 1.5 to 3.02/03 oe in one step
I still don't know whether need to use GTA 2.0 umd disk, as some guide didn't mention to use GTA though!
anyone can tell me above steps are correct or not?! many many thanks for your help!!!