The game is an SCI game. So unless ScummVM absorbs FreeSCI and manages to support any of the later SCI games, I would not count on it. However, the Windows version game works just fine on all four of my XP machines. The DOS version is also very easy to get going in DOSBox.
the Windows version game works just fine on all four of my XP machines
The windows version doesn't work correctly on xp. There's a memory problem at the end of the game. The game crashes when Torin enters in Lycentia's room.
I'm assuming that you used the TORINPAT patch which addresses a General Protection Fault error in the Windows version. I'll admit that I did not play the Windows version of Torrin's all of the way through in XP, but did play a good part of the 1st half with no trouble. JustAGamer said that it barely ran in XP. The DOS version still runs easily in DOSBox.