The Dos-Emulator, you've found works nice in Dosbox. :!: (Think you mean the "Arcon Atom Emulator v1.33)
I run Dosbox with WinXP....but don't know, if Dosbox also runs in Vista.
I'm working on an "Imagepack & Datfile" for the Frontend eCC (EmuControlCenter), and simultan on the "Acorn Atom Gamebase" (for the GameBase-Frontend)
With this two Frontends, you can simply start the Acorn Atom Programs, that are stored on the *.Tap-Images (found on StairwayToHell)
When i have finished this two Projects, you can DL it from Gamebase/eCC
Cheers,
Vicman