1. There is a News and Questions Forum, just at the bottom of the main page, questions such as this go there ✅
2. http://www.killermovies.com/forums/misc.php?s=&action=faq that is the KMC help section, it tells you about signatures there, and how to do it.
moving....
Upload signature using: http://www.killermovies.com/forums/sigupload.php?s=