Very easy bro just see video for model and be curefull for infinity 1.0 and 2.0 support for psp frist and do it step by step frist add update if psp need it and cfw chose the one to add in psp with out break or damaged…
Bro if you not break it with cfw and the damaged from you buy motherboard… If The psp not damaged and only cfw break system you can see youtube to unbreak psp 3000 easy…
I think you can buy it from AliExpress or any place i dont think for the model or sirial can hard for back from break only model for motherboard and add i see that for psp E1004 motherboard…