From the looks of this code, you'd be interested in my brand, model, year mod. Here's the details on it:
Allow the ability to insert Brand / Model and Year of each individual product. Great for those who use X-cart on Automobile or Bike sites who need a solution to allow for easy browsing of their inventory. Drop down lists are generated distinctively by every available product brand & model associated.
You can see a working example at:
www.extremepsi.com
hth.
