No, its not so necessery to run different pwads with not reload executable file, i just wanted to load several pwads with selected Iwad file. imho external launcher for your port will be better (like Zdaemon , ZDoom , Sculltag , and old good Legacy Doom launcher)
Can you please look at open-source Doom port named "ZDoom" ? http://zdoom.org/wiki/Main_Page
This port supports "Doom in Hexen format" and can play Hexen Heretic and all id Iwads (tnt, Plutonia, etc.)
and have good script support - "Decorate" format - you can strongly modify weapon items and creatures in your custom wads , also there is ACS support - using Hexen map scripts in Doom and Doom][ maps - this port imho much more interesting than prBoom, and supports all PRboom features. if you interested all of this and try to port ZDoom to Dingoo, I will be very happy - the Doom][ community maps and mods will be playable on Dingoo!
Good luck! i will be waiting your progress
p.s. sorry bad English