Hi. Firstly, apologies for being a newbie to all this, but here goes.

I am creating a car parts site, and what I'd like is 4 drop down menus that populate the sub categories into the menu below.

That may not make sense, take a look at: http://www.eurocarparts.com/

On the left near the top you'll see the type of menu I mean, where you select the manufacturer, then the model menu populates with the models of that manufacturer etc etc.

I have looked around a lot and can't find anything, but I hope someone will be able to help me here.

Here's hoping!

Jason