Third: Install armor:
1 - Extract files somewhere
2 - Using OpenIV, add the .YDR files from folder "armor parts" to your cutsobjects.rpf file that Downloads
First of all. make sure you have the required windows packages for ScripthookVDotNet: http://gtaxscripting.blogspot.com.br/2015/06/gta-v-net-scripts-setup.html
Script: Support link :) - Mirrors (Make sure to use the ScripthookVDotNet files that goes with the zip)
Armor - Mark III armor by JulioNIB: Main link - Mirror
Armor - Mark III armor by Rarefacer: Main link - Mirror (Blue version: here)
Armor - Mini Hulkbuster armor: Main link - Mirror 1
Armor - War Machine armor: Main link - Mirror 1 (Don't forget to update your script)