PSP help

I am trying to make a desperado cemitario to downgrade my fat psp, but i have cfw on my slim


so what i am trying to do is make a reversible desperado on my fat battery and installed off of slim.

Help?

just use the cfw psp slim to create the pandora battery with the pandora creator or whatever you choose to use, then just use an easy installer or your computer to make a magic memory stick

idk about the memstick, im needing help on making the battery

just find a pandora battery creating program, put it on your psp slim and put the phat battery in the slim and make the battery.

or look here http://psp.brewology.com/forum/viewtopic.php?t=7155
there are TONs of tutorials on downgrading. From soft pandora, to the manual cutting of them. Check it out, very helpful