I think we need to look into the BIOS and driver data on the powersave USB wire
This is a repost of my theory but even if the powersave application is 100% useless, it's wire gives us a means of connecting a game cartridge to a PC
Also there might be some interesting info laying in the firmeware/driver data; who knows!
this seems very promising actually. can someone smarter than me with actual knowledge of how stuff works look into this?