For the lazy here are the files you get from ripping it (should be legit, if not mods remove it.)
*** SHOULD BE WORKING BETA (I couldn't get MPH to work with anything so I need someone else to try this (a couple custom edits.)***
I coded a whole new PARAM.SFO for it so it actually shows up. YOU MUST DUMP IT YOURSELF AND EMULATE IT WITH THE MPH FIRMWARE LAUNCHER!
*** THIS MAY WORK THE WHOLE UPDATE PROCESS THUROUGH BUT, WILL BRICK YOUR PSP IF YOU ACTUALLY RUN IT!!!***
I'm new at coding so don't get me wrong if the dump comes out with errors. I did as many edits as I can. It was coded compared to the JP 2.0 update so it now should be able to be dumped. It has more features then 2.6 if we can get this dumped and emulated! I'm going to dump it soon where there'll be a video. Since this was before 1.5 it should have bad security so it could play homebrew! Hopefully someone can edit it even more to get it to run without bricking your PSP so we can have tons of features and homebrew!