I need help adding custom items like Ballista, and primordials boots and such. I've looked online and I can't find it anywhere. I'm not sure how to change any of the sprites or anything. Please help.

Add me On skype or comment back on here - My skype is Dustin-Jameson7, I also am having an issue with changing the client background. I'm not very good and I'm trying to learn to code. Any help would be Greatly Appreciated