How do you hack a psp Phat with 5.50 OFW

I have a 2 phat psp. A 5.00 m33 one and a 5.50 one.

I was so stupid to update it...so yeah..

So how do you hack the 5.50 one using the hacked psp one?

same way you did it to the other one

well i used chickhen on the other one....and chickhen doesnt support 5.50

use your cfw psp to make a softmodded battery. there's various apps to do that, the one that comes to mind is psp tool (http://www.megaupload.com/?d=S4BVA864) and then use psp grader (http://www.psp-hacks.com/2009/01/27/...v008-released/) to make the mms. Install the cfw on your psp, and then you can convert the battery back to a normal one using psp tool again.