My other modifications for Sega Saturn games: Click
For Powerslave, it's a widescreen hack or do you change other things too?
And which versions of the game is it compatible for ? NTSC U, J or PAL?
The PAL Saturn version, Exhumed, is actually the best version if you ask me. It was converted to run at the intended speed in 50hz, though the timing of a few things are off (fire rate of some weapons is lower). It also changes some item placement and has a couple of level design changes and improvements.
The issue with the PAL version is that it has a couple of glitches: the exploding mines in the underwater stage don't make the right sound (they make the kamel sound...), and in stage Canyon of Chaos, the kamel at the entrance of the stage acts like an exit kamel, meaning you can use it to skip the entire level.
Even though I used that 2nd glitch in my speedrun of the game, I still think it would be nice to have a hack fix those things.