If, on the other hand, you want to follow the easy method (which for now I recommend), please keep reading.
Sorry to disappoint): Skip this step if you already have Firmware 6.60 installed on your PSP.
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.
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.
Two of them are interesting for us: the Fast Recovery and the PROUPDATE folders.
Those two need to be extracted to the PSP/GAME folder on your memory stick.
Assuming you extracted the files correctly, you will see a few new applications in your PSP’s Game menu. You can erase the “Pro Update” folder from your PSP, but keep the “Fast Recovery” one.
Installing a Custom Firmware on your PSP 1000 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.
As a PSP 1000 owner, you can practically install everything you want on your device, and use other techniques such as the Pandora Battery to install a Custom Firmware.
If you are interested in the “advanced” Pandora Battery method, please go check that guide, or the “Power users” section below.