Hi there.
If you want, send me your e-mail and I can send you a complete set of bios, valid for mame and zinc (it's a bit over 7 mb).
As for running zinc in mamewah, I didn't use Howard's wrapper (not that there something wrong with it) cause I wanted to find a way on my own.
The solution was simple, to run a vbs (visual basic script) from mamewah. I've included the vbs; just rename wrapper.txt as wrapper.vbs. An in your emulator.ini in mamewah (zinc.ini) use the following settings:
### Execution Settings ###
emulator_executable d:\zinc\wrapper.vbs
commandline_format [name]{autodosbox}{nosafelaunch}
I know this isn't the most elegant solution, but at least it works (and it's my solution)

. Hope it works for you.
Cheers,

Congui