Use
DosBox to run the game. You can download it
here.
You might want to check out
the official DosBox FAQ, and particularly
this part of it. It is quite helpful for users unfamiliar with DosBox.
I suggest you also read the pages about
command line,
internal programs (very important!) and
the config file.
If that stuff is a bit too much for you, you might consider using one of the multiple
frontend programs available.
It's all easier then it seems. So remember:
DON'T PANIC!!! 