I've considered a lot of ways to do a front-end, but none of them have come to fruition yet. Well, except for one.
Have you tried using the DOS icon under systems? Not the DOSBox launcher under Emulators, but the icon that literally says "DOS"?
If you use that, it should let you find an EXE, COM, or BAT file to launch. It will launch with max performance settings which should work fine for most games. If you need to adjust the settings, press the power button to bring up the menu. Duke Nukem 2, for example, will run better if you limit cycles to 2000 - 2500.
For CDROM games like Cyberia, you'll want to create a BAT file that mounts the CDROM iso as the D drive before launching the executable.
Hope that helps!