Try fast way. It works in most cases, in my experience.
1. Unpack game where you want it (you did it already, it seems).
2. Enter game dir with your favorite file browser (I prefer Total Commander, but most people use Explorer, I have no idea why). Find CIV.EXE or what exe do you want.
3. Drag this exe over DOSBOX executable/link.
In 90% of cases it will automatically mount your dir and run the game.
(Other 10% still need more sofisticated procedure, described above).
__________________
|