Looks like both games are powered by ScummVM in their GOG editions. I don't know of any way to run the original versions of those games from the GOG copy. I had the same problem with I Have No Mouth and I Must Scream. It does look like a Win98 version of ScummVM can be acquired and/or compiled yourself? Can't speak to it's performance though.

Yeah thanks for the shout - good thoughts - I was trying to get them to run natively just for kicks. In both cases, the files that go on the hard drive are the easy part, then it comes to when the game looks to the D:\ drive for the game CD. I think it depends how aggressively it looks for the correct CD volume name or other checks - going to experiment with just putting all the files on a CD and giving it what should be the correct volume name if I can figure it out...

Some other GOG games like Tie Fighter, I think, have much easier bin/cue or game.dat bits in the GOG install that let you create the CD easily...