Make a copy of your Artemis Bridge Simulator folder - For ease of use place your copy of Artemis on your desktop. Alltho this is not necessary it makes the process a lot easier. If you do not already have Artemis you can download it from the Artemis sight of your can buy it on steam. If you have the game from the sight you will find the folder in: C:\Program Files (x86)\Artemis OR if your using steam you can find the file in: C:\Program Files (x86)\Steam\steamapps\common\Artemis
Move your EF MOD onto your Artemis copy- Now take the files found in the EF MOD and place them into your copy of your Artemis folder. WARNING!!! Do NOT place these files into your ORIGINAL copy of artemis. doing so will offer right your original game. ONLY place the files into the COPY you have made and say YES to overriding the files.
Now Launch the EF MOD - Run Artemis.exe from the copy folder that you just placed the MOD into. After the game has booted up you should see the Eastern Front splash screen.