You wrote in the first post that you chose the driver and started the game in DosBox already, so you should know already how to go to the folder of the installed game.
Anyway, after you mount the folder of the game and the CD-drive with
mount c c:\7thguest
mount d d:\ -t cdrom
you need to go to the folder of the installed game with
c: and type
install where you cna choose the sound card and the music card. Then you just type
t7g (it's
t7g.bat, a batch file to start the game) and the game should start. Questions?
