How to modify the product category page in woocommerce plugin?

I have woocommerce plugin installed on non-woocommerce theme. Eveything works fine. but I want to customize the category page. Each product of mine has two version, CD and MP3. on Category page,

http://www.technohubitgroup.com/relaxationforme/product-category/stress-mangement/

I want to have both price displayed. And then make a drop down box where user can choose the format and a Add to cart button. It is similar to the one used in single product page.

http://wordpress.org/plugins/woocommerce/