What I did was type it up in the box, and made sure there were no spaces inbetween the lines, then hit Enter once to put it on a new line... The forum signatures are kind of strange here, and can take a few minutes of tweaking to get right.
Or you can just do what I did with mine, and set up a web page for it.
"No programmer can pick up a TV remote without thinking what it would take to add a stun gun. [...] Their motto is 'if it ain't broke, it doesn't have enough features yet'" - Scott Adams,
The Dilbert PrincipleThe signature that was too big for the 512 char limit