Now this might be because I'm an idiot at this sort of thing, but here's what I did. I uploaded the folder to the addons folder and when I refreshed my roster, it showed a button labeled "Roster Config." naturally I clicked that, installed the tables, and was in the config page. I was able to adjust the avatar and preview it. However I switched to Signature and found this.
(see siggenerror1 and siggenerror2)
I dont know what to do or how to change the setting in the second picture. Help would be very appreciated.