Extender Pro category/tags archives filter question

#1
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?