How to Install PSP Custom Firmware 3.90m33 *Tutorial*

For those using PSP custom firmware 3.90 m33,it is possible to revert to the normal version(which is not hacked)it is located under the UMD sign at the games category.Note*U can still play PSP UMDs eventhough ur PSP has a custom firmware

Two questions:
1) Can you still play UMD's after Custom Firmware update?

2) Is it possible to revert to default firmware?

THANKS MAN YOUR THE BOMB

its harder for a psp 3000 apparently to SONY it impossible to hack them

OMFG this shit is too fucking hard....I got a PSP and I have a 2.81 verson and If I update it to 5.00 it will have to be downgraded to 3.52 then upgraded to 3.80 WTF this shit is too hard...WHY DONT YOU MAKE A VIDEO SHOWING EVERYTHING FROM START TO FINISH not" I assume you already have 3.52" ...WHAT? WTF I DONT!!!

I got the new psp 3000 I got 4.20, do I need anything else? plz reply I wanna download some games

when i try to install any custom firmware it says cannot start this game and then loads of numbers... any idea how to fix this people? cheers

Guys make your lives easy. Go to BestPspStore(dot)com and buy the Pandora Battery and Magic Memory Stick package. It turns your psp to 5.00 M33-3 firmware. It also gives you the BEST of the homebrew programs. Not to mention a guide on how to use them and custom firmware in general...

You can find out your PSP firmware version in the "System Info" menu.

what pandora battery and magic memory used?