DOSBox is an MS-DOS emulator. Basically, it lets you run old programs that Windows has "forgotten" how to handle, by making the computer "pretend" to be a DOS machine. You can download it from...well, I think there's a dosbox.com or something. ^_^
As for the Ultima Collection, I saw copies ranging from $15 + shipping to $175. For comparison, when it was new, it was $20.
Let's Play: Side x Side -- Every Version of Past Games, Together! -- http://letsplaysidexside.blogspot.com This space intentionally left blank. Hello sailor.