last time I listen to some moron's tutorial, I just got my psp, was following a tutorial to install the custom,but they said I needed 3.90 instead, after doing all that the freaking psp told me could not find 3.80p, but the psp wont recover so i can use the usb mode to add the 3.80, is that a major problem, or I can just add the 3.80 to the root by using a mini usb, what I'm trying say is is the psp still usable, if i add the needed file which is 3.80 to install