Ok so I've noticed Zip files have to be uncompressed to install to FH. Well here's an easier way ((Unless this is actually how you uncompress them then I just look like a doofuss.)) Anyways Download WinRAR it's free. And then get the Item pack you want. After you've downloaded the Zip file open up WinRAR and find the Zip file. Open it up and click Item Like so:
It says media
It says items
this is what is in the item pack.
And after that go to start (If you own a windows Sorry mac users this probably won't work for you my apologies.) Type in FeralHeart (2) and click the one with a folder image next to those exact words you typed. Then go to your WinRAR and drag the files into the normal FH folder. Then go back tothe first image when you download the item pack by clicking the .. buttons. Click the items.cfg and drag and drop it into the FH folder and ta-da you've installed your item pack. To make sure though go to your FH game and check the items. If they aren't there you've messed up somewhere. If you have any trouble's PM for help.