Er, sorry. Evidently as soon as I swapped over to Daemon Tools that error stopped coming up. Yeah, it was a MagicISO issue...
However, just so other people don't have the issue I had afterward: while installing, it looks like the program freezes. It's not freezing; it's just that the progress bar vanishes after awhile. It's still installing, though.
So yeah, sorry ponytale, and sorry totodile for not knowing how to deal with your problem. If I get any leads while trying to play the game myself, I'll tell you.
And totodile, I never came across the one problem. Sorry. The only issue that came up after the two above was that the game didn't want to run without the image mounted (but that's to be expected).