I've got it up and running. I have to relearn my keybinds.....
Saw you trying to connect, Slasher.
Easiest way is as follows:
With the default Arma3 Launcher, select: Parameters
click on the three dots to the right of MODS. Find @Epoch and click on it.
click on the three dots again. FInd @allinarmaterrainpack and click on it.
Be sure the box MODS is white.
Make the nosplash box white.
Click on Play.
The parameters line should look like: @Epoch;@allinarmaterrainpack