Hmm, all three mods worked for me without the problems described. I suggest you try to narrow down the problem: try to find the one mod that causes the crash. When you shut down Defcon, leave one of the mods active, and check whether it crashes on restart. Do that for all three mods. You don't have to reinstall the game if it refuses to start, deleting the file preferences.txt usually is enough.
Then, when you found the problematic mod, state it here, and paste the contents of the two files debug.txt (that one contains your authentication key, be sure to edit it out) and blackbox.txt here. They also should be found in the main Defcon directory.
The short version of all of the above is that I'm clueless
