Oh it definitely is installed properly. I am using Dosbox as well.
The installer for sure is different from the original--this installer is high resolution and even the sound selection screen is high resolution with pretty super vga (well, 640x480) artwork.
My fears are as worse as worse can be--that the 1998 CD-ROM version is modified from the 1995 CD-ROM version. Your installer is ANSI text right?
I bought this version off of Amazon and I suppose at the time did not know there was a difference between the CD-ROM versions. 🙁 It is as if the driver/executable is handling the MT-32 completely differently than the vanilla disk version.
I will check the config file and let you know.
One interesting thing--in the CD-ROM version I have, there are no .MT files in the various subdirectories (well, I'll have to double check that), but the file structures are different in some ways. Also, in order to run the sound setup, unlike the Disk version, I have to run Install, not Setup like before.
Do you run Setup on your version?