I am looking for a tutorial to go from OFW 6.37 to a permanent CFW that wills till play a UMD requiring 6.37 FW.

I looked around and with all the Pro-B hubub and all I was not able to figure out what I need to do.

I was previously on 6.20 TN-d perm on a PSP 3000. Got upgraded by accident.

Any and all help is very appreciated.