
The GEN series firmwares are custom firmwares developed by Miriam of PSP-GEN.com. It was first released on June 1, 2008. The GEN firmwares are just like any other custom firmwares, – full with recovery, the ability to play homebrew, and all that can be flashed to any 3.52 M33+ PSP Phat or Slim. (As of 5.02 GEN)
Is it stable as M33 firmwares?
With the release of 5.02 GEN-A, I say it is. With the support of popsloader using DAX’s releases, increased homebrew compatibility, and some other new features added in, it really is. So far, only one user has reported a bug with the ‘Format flash1′ feature in the Vsh-Recovery. (Which isn’t much of a problem)
What do I need for 5.02 GEN?
->5.02 GEN-A FULL PACKAGE
->PSP Phat/Slim with at least 3.52 M33 -3 installed
->Something that handles .rar files. 7-Zip is free and it handles them..
Once you got everything down, it is time to install. If you are installing 5.02 GEN, read only steps 1a, 5a, and 7.
1. Once you have downloaded everything, extract it. A folder named ‘PSP’ should come out. Just copy that folder to the root of your memory stick and overwrite everything. No harm will be done except for the fact that whatever previous update you had will be overwritten.

2. Disconnect your PSP from USB Mode. Reboot into recovery, and change the kernel to use the higher kernel version. (NOT 1.50 kernel. The 3.xx/4.xx/5.xx ones) You must use this kernel or else you will brick.
5. Once that is set, move to Game>MemoryStick, and search for the 5.02 GEN update. If you have a battery charge lower than 78%, hold L + Triangle to bypass battery check. If not, let you don’t have to.
6. When it launches, you will be given the option to chose between the Full and Lite versions. The Full version is everything with the ability to launch ISOs, and all that good stuff. The Lite version is the stripped down version of the firmware which only allows you to run homebrew, and signed games. (Not ISOs) Make your selection and accept the agreement. The update will continue.

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7. Once the update start, it will display the bit of humor we all need. Press X when it says to launch the sce updater.
8. The Sony updater will load. No panic. Just update normally making sure that the power to your PSP does not cut out during the update. When it is finished, you must press X/0 to reboot or else you will brick!.
8. After the reboot, you will be on 5.02 GEN-A. There is a 1.50 kernel for Phats. (Below)
Download PSP Custom Firmware 5.02 Gen-A
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