I'm speaking about PSGroove. I have been messing around with it myself but I really have no clue how to do this sort of thing. I will upload the .hex files I was wanting to run via the S1 if someone is capable of doing so.
I tried to upload a dump of my s1 firmware but it wouldn't allow me to since the file size was too large, instead I'll just list which firmware mine uses.
I hope someone can figure it out, I would appreciate it greatly.