@8up-local - This is what I've observed.. I have tried this on 4 different machines. I cannot get this to work on 2 of my 4 machines, using the same method.
Works:
Clean install or Upgrade install on Windows 7. You do NOT need the 4Gig Patch for this to work. Game version - Ver.18/01/29. Mod version - 1.6.8. I was able to do single and multi with custom maps + custom objects. Mod Options window shows up on the main settings screen no problem.
Doesnt work:
Clean install or Upgrade install on Windows 10 ---- Game version - Ver.18/01/29. Tried Mod version 1.6.6 and 1.6.8. Tried including and excluding 4Gig Patch. I could NOT get any combination to work under windows 10.
From my perspective it seems like this may be a bug related to OS. @GumbootGambler - For those users here that have configs that work, which OS are you using? Is there anyone here who has it working on Win10 Latest Update?