There’s basically 3 easy steps (you were expecting more?Sorry to disappoint): Skip this step if you already have Firmware 6.60 installed on your PSP.Danish, German, English (United States), Spanish, French, Italian, Dutch, Norwegian, Polish, Portuguese, Russian, Finnish, Swedish, Turkish, Japanese, Korean, Chinese (simplied), Chinese (traditional).
The current version of the software, 6.61, was made available on January 15, 2015.
It is a minor update released more than three years after the release of the previous version 6.60 in 2011.
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.
Make sure the PSP has about 50% battery and is connected to a power source, just to be on the safe side.
If it powers off while it's updating, it can be a nightmare to fix it.
Back up your save files (so that if they get corrupted, you still have backups) How to install 5.50 GEN-A CFW on your PSP: Extract the 5.50 GEN-A files to your computer. (Yes, just drag the whole folder there) Run 5.50 UPDATE from under Game on your PSP's XMB After THIS process is complete, press X.
PBP in the folder PSP/GAME/UPDATE - it is important the the folder names are ALL CAPITAL LETTERS.
In order to install Pro CFW on your PSP, you will need to first update your PSP to the 6.60 Sony firmware (which, at the time of this writing, is the latest firmware released by Sony), if that’s not already the case.
There are versions of Pro CFW that will run on older firmwares, but updating to 6.60 will guarantee the best compatibility for your official games.
Installing Pro CFW on your PSPGo is simple, free, and is not much risky than installing a Firmware update on your device.