qm2hill, when you buy a game from GOG that has been optimized to run on modern computers, it is usually already in an emulator. Have you tried changing the screen resolution on your monitor? Are you using a wide screen monitor?
And, yes, as long as you do not connect your older operating systems to the internet, you should be fine. However, if you want to be extra careful, you could always disconnect your main OS from the internet just while you are playing the game.
Oh, and welcome to Gameboomers! It's nice to have you here!
