about dosbox

hi i was here back in feb. trying to get warcraft 2 to run i needed dosbox
and Paul and Jimmy helped me get it and the game is doing great....i printed
out everything Paul told me to do but for some reason i can't find how to
get dosbox on...i need to put it on my husband's computer and i don't know
how....can Paul or Jimmy ....tell me again in real simple terms step by step
so i won't have to keep bothering u like i did last time...my cd rom is
D.....thanks Patsy