WooCommerce

Hi all, I am attempting to use the  WooCommerce plugin to add a shop page to my store.  However it does not integrate well with the Simple Catch theme. The recent posts, archives ect move below the products and the product description expands to the edges of the screen unconstrained. Woocommerce provided the document 'wcdocs.woothemes.com/codex/third-party-custom-theme-compatibility/' about compatibility but I don't know where to edit or start with the Simple Catch theme as it isn't as straight forward. Any assistance would be greatly appreciated! Thank you