Ive been trying to use the MW 5.0 installer for about three hours and am out of ideas. Has anyone figured this out???

You have to "move" the World in Conflict folder to Public

Talking about the folder in your Windows Profile
aka

C:\Users\Public\Documents\World in Conflict\Mods\ *modname*
that is the path where you have to create the mods folder first. (see line above)

I installed the newest Version of MW mod there "manually" and it works