Even if you get SOTE installed, good luck running it on new systems. The game runs often way too fast, and video is often corrupted on new video cards. Also, you may get some other anomalies, due to the lack of fog on newer video cards.
From what it seems, SOTE uses a heavily modified JEDI engine. I'm unable to confirm this though. If it is, I imagine at least getting the levels rendering in XL Engine wouldn't be too hard, would it?
No it uses a "new" engine - though they did use Dark Forces and the content pipeline used in Dark Forces for early prototyping. But the final engine was "true 3D" since that was actually the easier route for the N64. The Windows version of the game came later (and had lots of issues on ATI cards of the time but worked reasonably well on other hardware).
Anyway I'll keep the game in mind, I do have some fond memories of playing it on the N64.