Custom firmwares for the PSP has been since 2006, when Dark_Ale X did a proof-of-concept firmware based on the 1.50 version.
He added some extra functionality like autorun an homebrew, a limited recovery mode and so on.
How to update the PSP custom firmware: Since the 3.90 M33 version, it is possible to update the custom firmware directly from the "network update" menu.
Okay guys so this one may actually be somewhat useful.
If you ask why I wrote partly behind the PRO CFW and Downgrader, then you’re asking the right questions.
At first the PRO CFW: I said partly because Qwikrazor did not update the c IPL Installer for the PRO CFW (only supports PSP 1000s & non-88v3 2000s), which means there is not “full CFW” for firmware 6.61 as of now.
To install the 6.60 Firmware, just unzip the archive on your PSP’s memory stick, in the “PSP” folder (you should end up with an “UPDATE” folder in the PSP folder, if you do things correctly), then run the update from your PSP menu. Ask for help on our forums The Pro CFW archive provides several subfolders in the “PSP/GAME” folder.
You will have to downgrade to 6.39 and then update to 6.60, if you really want to return to firmware 6.60.This release permitted to run compressed games from the memory stick, in CSO format. Still 3 months later, Dark_Ale X released the 3.02 OE firmware.Also this firmware gained an huge success: it permitted to use the internal Sony Playstation emulator!Now you are helping others, just by visiting wiki How.World Possible is a nonprofit organization focused on connecting offline learners to the world's knowledge.I found my old PSP and decided I'd put some emulators on it, SNES, Game Boy, etc. When you find it, follow the instructions on the page to download it to your computer. One of the things you need to do beforehand is install custom firmware on your PSP. The custom firmware you put in your PSP depends on what firmware you currently have installed. For version 6.60, just go to this page and choose one of the sites: I don't know everything about all the sites and I can't personally vouch for their validity. It could be the humor, the pretty pictures, the degree of unhelpfulness, or anything. Installing Pro CFW on your PSPGo is simple, free, and is not much risky than installing a Firmware update on your device.It does not require any advanced hack technique or hardware modification.Installing a Custom Firmware on your PSP Go has never been so easy.In this page I’m describing the easiest possible way for you to install the most reliable Custom Firmware on your PSP: Pro CFW.