Nice!
It does work. I've made it work, sorta. My Saturn is an unmodded model 1, so I tried using the disc swapping technique for scenario 3.3*, replacing my game with the translated-patched ISO, and I played for a while, but then I started getting a "disc read error" and couldn't continue anymore.
I tested it with an emulator, though, I forgot which one (Cassini maybe?). I didn't have my save from the previous scenarios, so I didn't continue, but it seemed to work just fine. If you have trouble with the disc swapping, play them on emulators.
* I played through 3.2 all in Japanese using a printout of the translated dialogue from Shining Force central... lol. Didn't know of the patch or disc swapping trick at the time, and had no laptop to carry on my couch. Pro-tip: don't do that except as an extreme last resort.