How can I be switching masterpages in a RPE template for DNG wrappedresource artifacts
2 answers
You can use dynamic master page, where Page orientation and Paper size properties are assigned dynamically. Please refer https://rpeactual.wordpress.com/2014/02/21/new-in-1-2-1-dynamic-master-pages/
Another simple solution is to have 2 different master pages and assign them to different sections. In the screen grab, you can see that for the Container that handles wrapper resource, MP2 is applied.