Need help editing Wootique theme.

Can any one help me with an issue i came across while working on my website.

I am using Woocommerce 1.6.6 and the Wootique theme. I had disabled the side bar in my Category pages, but came across an issue with what i believed was the CSS. While using Firebug, I noticed that the default inside of the “Category” Pages made each product listed displayed in 3 products per row. I want to change that into 4 per row. So It is equally distributed. Inside the HTML the li product list goes like this “Product First, Product, Product Last, Product first”, this is creating the issue..it needs to be first…product…product…last for FOUR equally spaced li items. Now that i know the issue i can’t locate the folder or file it is in to change it. I know the page is created with PHP, but I am not very PHP knowledgable. I need to be able to modify the right file so that the Html displays correctly.

I have tried to locate the folder multiple times. I believe the issue lies inside of a “Product-Catagory” PHP file, If any one knows where i can find the file I would appreciate it.

Here is the link to my site. I was able to find the php folder for the featured page and fix it but i can not find the folder “Product-category” page.

http://americainkapparel.com/test/test/product-category/men

Thank you for your time.