Hello, I was wondering what the latest firmware is. I am getting a psp soon which I will also be repairing but after that I do not know if I should upgrade its firmware or stay where it is right now because I was originally just going to get PSP games but some homebrews I saw were appealing so I am going to go both ways. Anyways tell me if I should upgrade it or not. 5.50 Gen D3 firmware. Is this compatible with almost everything?