Ok, I will try to help out. Unzip the mod, open the data folder, Campaigns folder, Campaign folder. You will find 3 MIS files in there. One for GWX 3.0, one for the stock 1.4, and one to be manually merged into your present Campaign_LND
IF YOU ARE RUNNING SOMETHING DIFFERENT THAN GWX 3.0 or Stock 1.4. In my case, I run GWX 3.0, so I take the file named Campaign_LND_GWX30 and change its name to Campaign_LND. I would then delete the other two files Campaign_LND_Stock14 and Campaign_LND_to_be_merged, and then put the mod into my JSGME Mods folder and enable it.
I hope this explains it well enough for everyone.
