this file's located on your dev_flash2. SKFU attempted to document it, but still got a lot of things wrong, im posting this here in hopes a wondering PS3 god will pass by and shed more light on the subject
things figured out so far: http://psx-scene.com/forums/showthread.php?t=65622
(too much to copy and paste sorry!)
i wrote an app based on my own findings (and help from k4roshi in the thread above regarding offsets in data entries), available at http://stoker25.com/files/xRegistryEditor03.rar
(source, exes are in xRegistryEditor/bin/debug), it seems to work fine, not sure if changes actually effect the PS3 though since there seems to be some sort of checksum there
any help is appreciated
would love to see the PS3 scene start off nice and open unlike other consoles...
(FYI: registry contains bluray/dvd region code, as well as the current server (np/sp-int/mgmt/prod-qa) and other goodies, surprised nothing has been released already...)