oh its very easy, just copy all the material, mesh and texture files into the item folder. Then copy the code from the readme file into items.cfg and you're done. 
To add to Shakar first you have to actually download a file from somewhere, then do what Shakar says.
But actually the file downloaded should be a '.zip' then you copy all the files from the folder then you move them to the Feral Heart>Exports. Once the files are in exit the game then open it back up then your items should be on the 4th tab on the character creation screen.
