you could also use gmpublisher to downloadd this just go to your installed addons and extract them to a folder and then put them in the addons folder of gmod

Installation guide is actually easy thanks!
(im not good at instructions in general)

Thank you for the reuploads so far, it's a shame he keeps taking the ports down as they're the only ones so far that work well and cover nearly everything- and these uploads work perfectly as well. Actually, I never even needed to unpack this one! But I appreciate having a guide written up anyway in case, you never know with Gmod installs.