Well the question is self explanatory! but the thing is I have no experience with javascript at all, but it seems to me that it's simple to do just that!
oh and the changes will be only into the css side nothilg will change into the html, by the way this is a CMS template (joomla) so the index is dot-php wich should make it easy... I think!
the idea is to show a diferent set of images for ie6 (none actually), and I'll ask people to update to a new browser using another JS that I already have! and showing a picture of how the template looks like on FF and new versions of IE (7,8)
oh, I intent to learn PHP and javascript but first I have to master CSS, it would be easy without IE6, but in this particular case the template depends on png so, that is not way I'll be able to make this work even with the IE7 project and all!