There's no such thing as a 'product template' so I'm not really sure what you're asking. If you add products, the product info pages will all display the same.

It looks like you have your products set up already, anyway.

If the issue is that you have product descriptions that are the same from product to product, you could use this:

http: //www.thatsoftwareguy.com/zencart_boilerplate_files.html

to save some time, but it doesn't sound like you have enough products to bother.