Updating psp through usb
A permanent CFW is when you turn off your PSP by holding the power switch or running out of battery, and you see the ‘Sony Computer Entertainment’ boot logo, the CFW remains installed.
Either do not run, or even delete the ‘fast recovery’ option and reboot your PSP.
This varies between PSP models, chipsets and custom firmware support. Some custom firmwares (PRO for one) will allow you to make the cfw if your PSP supports it.
This doesn’t mean you’re stuck with it whether you like it or not.
Once done, you can now disconnect your PSP from your computer. You should now see some new exciting options (examples from PRO-C)! Prepare a brew and dig out the biggest pack of biscuits you’ve got, this is going to take a while.
Open 661 PRO-C Fast Recovery (PRO), and wait for your PSP to reboot.