"they need to get the basics right. We (or at least I) don't expect complete and utter realism, but joh, at least try to get it as right as possible." That's exactly what I mean.
I don't know you should be able to install E4Mod-Files with the em4 mod-installer. Maybe try to delete Em4 completely from you computer and install it again. Then download the mod and it should work.
Maybe the Mod-Installer is broken. Once I had the same problem and the following post in the Steam forum could help me: http://steamcommunity.com/app/323610/discussions/0/616189106451004584/?insideModal=1 Try it. If you'd still be having issues with it I would seek help in the technical support section of Em-Planet.