In my zencart, i want customers to be able to search by model year and if the item is discontinued etc.

If you look at my site, you can see i have 4 current fileds "Product Image Description Price Model"

http://www.whiteracingproducts.com/i...ex&cPath=3_125

I want to add to those fileds "Qty Req - Model Year - Discontinued Y/N?

How and where do i add this data?