First of all. Download Dosbox-0.72 http://dosbox.sourceforge.net/download.php?main=1 and install it.
Second. Install TTD to the same directory as you installed Dosbox to.
Third. Copy all your TTD files from the cd into the same directory as dosbox.
Fourth. Open dosbox.exe and wait for the prompt.
Fifth. Ok for example my dosbox directory is C:/dosbox-0.72.
Type in after Z:/> mount c C:/dosbox-0.72.
Type in after Z:/> C:/ so it switchs to your mounted folder.
Type in tycoon.bat and voila. It should be working fine.

