I believe Suckerfish can help..
My understanding is that IE6 only supports the :hover psuedoclass on anchor (link) elements. That would explain the issue your visitors see.
See if the sfHover function from the Suckerfish Menus (http://www.htmldog.com/articles/suckerfish/dropdowns/) will help you.
jeff when you say a
Jeff when you say a 'generic' file it makes me think that you are probably thinking of the csshover file
however I'm surprised a little searching of past forum posts didn't throw up answers as we've mentioned the file in reference to drop down menu quite a few times before.