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[Scatty]

If you allow me the question, why do you need to download the game from here if you still got the original CD? The version hosted on Abandonia is a floppy version for space reasons, which, aside of lacking the speech and other advantages of a CD version should also be an older version with more problems than the CD version has.
But to return to your troubles, try using the following commands to mount the folder with the game:

mount c c:\
c:
cd (folder where you got the game placed)

Also when you select the soundcard and music card in the setup / install, keep in mind that DosBox's default IRQ for Soundblaster is 7, which you should set it to. These settings are default and should be without problems - Soundblaster Pro, Port 220, IRQ 7, DMA 1. Setting them any different might be the problem with the character selection screen (not sure, since I never had that problem with my CD version).
Might also be that the install program doesn't ask for the values above, aside of selecting a card, it's a while since I played the game.