I didn't make it!
I reviewed the error log that DC creates called warnings.log. That states that the WXPMod_DCMod.dll could not be found, even though it was clearly in the root directory. My fix was to modify the annihilation.module file in notepad. I changed the dll file to WXPMod as opposed to the WXPMod_DCMod. Once I made that change and verified that the DXP2.module file was not read-only, I gave it a whirl and now I can switch back and forth in the game manager between DC and Annihilation. I hope this helps some folks who are having problems.