produke.grp(from proDuke's folder) as well as all files from the zipped download below into you Mapster32 folder and everything will be ready. Do that and when you open Mapster32 the proDuke resources (new sprites/textures and palette swaps) will always be loaded automatically. The same will happen with the helper subroutines for repetitive tasks that we implemented via
produke.m32, meaning it won't be necessary to open the console and do the include manually everytime you want to map. If you need to get Mapster32, you can do so on the EDuke32 website (it comes included with EDuke32).