Thread:Banan14kab/@comment-1635895-20120929080459/@comment-1635895-20120930015112

In your preferences in the signature field, enter. Then, create "User:Banan14kab/Sig". On that page, insert your desired signature.

I've done the same, as you can see here.

Mind you, with message walls and whatnot, signatures are on the way out.