Download ChickHEN here Download this Rename it EBOOT.pbp.
Create folder in PSP/GAME called UPDATE put the eboot in there.
Go to psp, go to gmae -> memory stick and run the update.
Connect psp to computer.
Backup your Memory Stick onto your computer.
Go to your PSP, Format the Memory Stick and Restore Default Settings.
NOW, plug your psp back into the computer, put h.bin in MS root, and the ChickHEN folder in either ms0:/PICTURE or ms0:/PSP/PHOTO.
Navigate to your pictures folder, click on the ChickHEN folder, and wait. In 1-4 tries, your screen will flash green and ChickHEN will have loaded. Plug your PS back in and if you want 5.03 GEN-A download here and for cfwe 3.10 here. Follow directions in readme for each one respectively. Then once they are on your PSP, you can use ISO, Homebrew, everything just like cfw, but do not shut your psp all the way down. only put it into sleep mode. If your psp shuts all the way down, then you will have to do the ChickHEN again and install GEN-A or cfwe 3.1 again. Hope this helps!