Extender Pro category/tags archives filter question

Hi, I'm hoping to implement an elegant solution using Extender Pro in combination with GeneratePress and Tom Usborn's WP Show Posts plugin (nice plugin btw). WP Show Posts (WPSP) gives both a shortcode and the php code for each custom post list created, but isn't designed out-of-the-box to override WP's category archive loops.

I'm a newbie to using filters, so my question is how might I create a filter for one or more categories/tags to replace the WP loop with something I created using WPSP?