Are you using Daemon tools? I was messing around last evening and was able to run a batch file that mounted the image and loaded it in Chankast. Just like Papa said in the above post.
I haven't tried this yet but I believe this is what you need to do. Extract the Chankast Wrapper files to your Chankast folder. Double click on the file, chankast-launch.exe to launch it. Answer the three boxes, save and exit. Point MameWAH's emulator.ini file to chankast-launch.exe as the executable. You may have to experiment with the other setting like send full path, include quotes and so forth. It also seems that some of these depend on what version of MameWAH your running and the options available. I usually go overboard to start by setting all four (matbe 5) option to "1" and show dos box to "no". I don't think Howard's wrapper will do any string manipulation. I believe it will forward the string it receives directly to Chankast, hence, send full path, include extension, add quotes and long files names should be "1".
Good Luck,
John