You could check here, might help :

http://www.techimo.com/forum/technical-support/117644-ntdvm-cpu-has-encountered-illegal-instruction.html

Hey all - I tried mounting it with daemon tools lite, then running the INSTALL.EXE under Win95 compatibility, and keep getting this error:
I:INSTALL.EXE
The NTVDM CPU has encountered an illegal operation.
CS:0000 IP:4b4d OP:63 61 74 69 6f Choose 'Close' to terminate the application
[Close] [Ignore]
Choosing Close closes the executable script, and choosing ignore seems to lock up that script/loop it/whatever.

Anyone have an idea how to get around this? Thanks for any advice!

If anyone is wondering, the ISO currently here is a working copy.

A tested, full and RAR'ed ISO has been uploaded and sent off, now it's just a matter of time before it turns up here. So stay tuned.

I eventually had to resort to CloneCD to make a functional copy, not my usual tool of choice but all other programs I tried had trouble with the music track.

Will this be fixed any time soon?  i remember playing this some years ago, was really good, great story and good enviorment.