I like to run the older versions of games as well as the most recent, as well as having wads with demos etc. that are designed for specific versions. The game does recognize that I HAVE multiple variants of a pwad available, but it seems to simply randomly choose which one it wants to use when I launch the engine. Is there a way for me to select WHICH data file I use, for example for Doom Registered I have 1.1, 1.2, 1.666, 1.8, 1.9. How do I select 1.666 when I want to run an older wad for closer compatability, or 1.1 if I want to see the various changes made to the maps?