So, I downloaded dosbox and deathgate, but I can't understand how I can install
it. dosbox won't let me mount D: . Can it be that my real D: is cd-rom drive? I can ghet to installing,but after choosing soundcard it crashes. I have tried install with no sound but doesn't help. I think the main proböem is with drive D:

OK - first off - there's no need to install. The game is pre-prepared so you just extract it and play.

In DOSBox if you want to have the CD-ROM drive you should type the following:
mount d X:\ -tcdrom
This command will mount the X drive as your CD-Rom (but instead of X you should use the letter of your real CD-ROM drive).