Hi, just got it working on my PC, I also had some troubles first.
In Windows it was ok to run if from the CD directly but not from a hard disk copy (error/freeze after intro screen), so I had to play around a bit...
Copy the "/PRODUCT/FULL" directory of the CD-ROM to the harddisk (any name should do). In DOSBox, mount the directory as a CD-ROM with the correct CD-Label - example for Windows:
mount c d:\Dragonslair -t cdrom -label DRAGONSLAIR
"d:\Dragonslair" in this case is the copy of the CD or the "FULL" subfolder on the harddisk.
On windows PCs the label is auto set if a CD is mounted, if you provide the CD label on Linux system it should work too. I hope this information is still useful for somebody. Have fun!