PSP 1000 with 6.20 OFW
 

Hello, Everyone! I was wondering if any of you know if a PSP 1000 can be updated to OFW 6.20? Kingdom Hearts Birth By Sleep is coming out in a few months, and I think I need to update the PSP now. So, I just want to know if it is possible to update a 1000 to 6.20, and maybe HOW to do it because I'm not that familiar with PSPs.