First, check out this Mass Markings pack, it's the one I have. It has a ton of Markings (way more than in the picture.)
Then, download it:
Now your half way there.
First, open your Computer Library to your downloads, then open the Mass Markings folder.
Next, open Readme! and copy everything in it into your item.cfg in your Feral-Heart folder.
Turn the items.cgf into a note pad or word document when you get the message were it won't open. then paste everything from the Readme! into it. Save it, and close. Do not delete anything from the items.cgf folder, it will distroy your F-H game. Messing up on this can also cause your game to stop working. Follow all instructions, don't skip steps. The name of the items.cgf will turn into "Items", if you do it correctly.
Keep F-H closed when your doing this, otherwise it won't work, and you'll mess it up.
Next, go back to Downloads and go into the folder again with the Mass Markings.
Copy all of the mesh stuff and put it in: Feral-Heart> Media> Textures