Version 2.2
Contains ModContent.hpk
Download zip file
Extract ModContent.hpk into a directory called PatriotMissile within your Mods directory.
Restart game.
Enable in Mod Manager.

The zip file contains one file:
ModContent.hpk which is an archived Mod file.
Create a folder under your local Mods folder, call it PatriotMIssile
Put ModContent.hpk into that folder.
Run game and enable mod in Mod Manager.