How can I install a new firmware or update to my PSP?

Im just curious. I know what im doing, but im still a "Noob" in a sense and dont reallyknow what most of everything is.

Hi,,, I have a 2006 model slim psp... i changed it to custom firmware so that it would be easy to play cso and iso games...It worked great.. But nowadays some new games like Gta chinatown wars, assasins creed Bloodlines, resistance retribution and a...

i'm trying to hack my buddies psp anyway i got the firmware, but when i try to install it it just says corrupted data. i have it in the correct place psp/ game/ update.. if there is an easier way to hack i'd like to know that as well

I recently bought a psp 1001k off of Amazon.com and bought a couple games (Dissidia 012 and Final Fantasy IV The Complete Collection) while I was at it as well. However, whenever I go to play these the "Game Could Not Be Played" (or something...

Does anybody know how I can update my PSP Slim and Lite from official firmware 4.01 to custom firmware 4.01 M33 without using pandora battery and magic memory stick?

i have a PSP with an official firmware of 3.80.. how to downgrade or install custom firmware?? please help.. i need step by step tutorials...

i want to update my psp firmware 2.81 to a 3.30 so i can upgrade it again to 3.50 and then downgrade it to 1.5 with the Lumines plan. but i dont know if this will brick my psp. but first i want to upgrade my 2.81 firmware to 3.30 but is this possible...

I just bought a PSP and in the box there is a disc with some software update...if I run the update will it update both the PSP software and the firmware or only the software? I ...show more

I foolishy upgraded my psp slim 4.01 to 5.5. Only now i know that there is no custom firmware for 5.5 firmware. How can i downgrade my psp and install customfirmware?>??