WARNING! You can brick your psp doing this! I take no responsibility if you brick your psp nor do the site this is posted on Always backup your flash0 and NEVER edit any other file in there, only if you know what your doing
This will may work in ChickHEN with CFWE. I managed to change a coldboot in ChickHEN and PSPFiler 6.0. Otherwise, i don't really know, others may confirm that if they wish
Heres some gameboots:
Gameboots
What you need:
PSP with compatible CFW
USB cable
PC
Custom gameboot
1. Turn on the psp holding R, now your in recovery.
2. Go to 'Advanced', toggle flash0 with your usb plugged in.
3. On your pc, go to 'My Computer' (or what ever it is on your OS) then you should see some folders, go to 'vsh' then 'resource'.
4. On your pc again go to where you saved your custom gameboot then copy it into the 'resource' folder on the psp, it should come up with a pop-up asking you if you want to overwrite, click yes.
5. On the psp exit recovery and if it's not bricked, test it by going into a homebrew or iso etc. if it works, congratz, you installed a custom gameboot, now you can charge your friends to install gameboots!
Made By iPenguin2 of pspmod