This should explain how to install Galactic Armory in a few easy steps.
1) Download the file provided in this topic
from any of the links (mediafire or moddb)
2) Extract the contents of the file using your favorite archive manager (WinRAR, WinZip, etc) and then copy the GalacticArmory
folder included to either: Documents\My Games\Star Ruler\Mods
or the install location with the default being C:\Program Files (x86)\Star Ruler\Mods*
3) Start Star Ruler and in the New Game Menu you can select Galactic Armory from the drop down list where it says Mod:* For steam users this will be C:\Program Files (x86)\Steam\steamapps\common\Star Ruler\Mods