Update: The new PSP-3000 cannot currently be downgraded, and PSP-2000 models with a TA-088 v3 motherboard cannot be downgraded either, ALL other PSP models can be downgraded, (including the newest PSP-2000...
There are many downgraders and downdaters out there to downgrade PSP with firmware 2.0 or above back to 1.50. But all of them warn people not to downgrade a PSP with a TA-082 motherboard.... In this guide, I...