I would like to point out that not only is the command line not the same as dos, but in the case of 2k/xp the command line isn't even a true command line!
Xp and 2k don't have dos, they have a dos emulator. Any true dos app ran in them will:
A. Not run
B. Run with severe errors
C. Run slower than the same app would run on a 486.
Long story short.... if you want to run vantage, get a pos machine and install dos on it.
It's silly to run vantage on a amd 2200 btw.... that'll run everything in mame just fine in xp.... no need to lower yourself to using dos, 9x, ect.
Vantage isn't a "want to use it" type of emulator, it's a "have to use it" one. Mame is better in every single respect, it just happens to be slighty faster. I guess it would be good to run pacman on a p66, but that's about it.