Minwah! Wow .. I didn't think the creator would answer my question!
Yes, I did 'add emulator' when I set up Mamewah. When I set up the default MAME emulator, it doesn't find my ROMS when I do the 'refresh game list'.
As far as I can see, the only thing I really need to enter is the path to mame.exe, which on my PC is "c:\mame\mame\mame.exe" (ya, the directory is redundant). When I add an emulator, there's an option for ROM path which defaults to c:\mame\mame\roms after I set up the executable, but using the default MAME settings, there's to place to enter the ROM path. Can I just manually enter a ROM path in the config file?