Im really bad at explaining stuff so if you don't understand what you have 
to do or would just rather use the steam workshop version here is the link http://steamcommunity.com/sharedfiles/filedetails/?id=644345237
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1.Download and install WinRAR
2.Download and extract GB-HNS.rar
It should download to folder Downloads. Open GBHNS.rar in WinRAR and choose "Extract To" and then "OK" to extract it to folder Downloads.
Find extracted folder secretisland
It should be in folder Downloads
3.In a separate window, find folder csgo maps folder
It's probably here: C:\Program Files (x86)\Steam\steamapps\common\Counter-Strike Global Offensive\csgo\maps
4.Drag the bsp file into C:\Program Files (x86)\Steam\steamapps\common\Counter-Strike Global Offensive\csgo\maps
5.Play and have fun!
6.If you download this map and enjoy it, it would also be greatly appreciate it if you could give feedback and such here
http://steamcommunity.com/sharedfiles/filedetails/?id=644345237
Thank!


