The game is The Incredible Toon Machine, which is a CD-ROM enhanced version of Sid & Al's Incredible Toons. The original game was for DOS, but this enhanced version is only for Windows 3.1.

The game works perfectly without DOSBox on my Windows XP machine, but I'm trying to make it work on DOSBox anyway so that I can keep playing it once I finally ditch WinXP and get Win7, which won't support this game.

I've extracted the bin/cue from the CD-ROM, and I have confirmed that the image is fully usable; the game still works in Windows XP when I mount the images in D-Tools, and I get FMVs and redbook audio.

Here's what I've done in DOSBox. I've installed Windows 3.1 following the guide. I've gotten a couple of other games to work, for instance, The Journeyman Project Turbo. I have mounted this one's image with this command in autoexec:
imgmount d toons.cue -t cdrom

I can install the game fine. The installer includes Video For Windows 1.1, which appears to install fine. Then it asks me to reboot. I reboot the virtual Windows machine. When I run the game, it reports this error:
Toons MCI Error
There is an undetectable problem in loading the specified device driver

After I click OK, the game plays normally, but there are two problems. The intro FMV looks like this:

It's *supposed* to look like this:

The other problem is that the redbook audio won't play. It's not the image; I can play music just fine with the mounted image natively in Windows XP.

What's missing?