Basically I'm trying to figure out the best way to change the left navigation section in sharepoint 2007, the area that is also referred to as the 'quick launch bar'. I would like to implement a simple drop-down menu system. So you hover over a link and more appear. This may be very simple or may not be possible, so I figured I'd ask. 

I would only like to change the navigation for one site, not everything. This is an intranet site not public facing. I'm not sure of the version but I think its enterprise. 

Thanks