ive had some similar problems but got it all working sweetly now

under emulator settings, look for list generation settings. set this to
rom folder only.
then refresh the list..
this will ONLY give you the names of your .zip files.
If you want (and im sure you will) the full names and details of the games you need to goto the command prompt or dos and navigate to your mame folder and enter -
mame -listxml|xml2info > mame.dat
This will create a .dat file within your mame folder.
now go back to mamewah and change the list generation settings to
romvsdatfile
and refreshyour game list
hope that helps
