Simple steps:
Step 1: Download the item pack
Step 2: Locate the downloaded item pack
Step 3: Open up the downloaded folder
Step 4: locate the .CFG file names 'items'
Step 5: Place the .CFG file into your main FeralHeart folder:
Step 6: Go back to the downloaded folder
Step 7: Place everything else that is inside the folder into;
Local Disk (C:)\FeralHeart\Media\Items
Step 8: Restart FeralHeart and enjoy your items!