I just looked... Click on "profile", then enter your username & password (if you have to), click "submit" (or whatever it says), then you should see the screen with all of your personal info, scroll down until you see the signature section, add your quote in the text area, & make sure you hit "submit" (it was something to that effect) at the bottom so it'll save whatever you've added.
Hope this helps!
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~LW
*~*Member of the Lenny-Lovers Club*~*
*~*Member of the Fonzie-Lovers Club*~*
"Loosen the bell! The goat is home!" -Richie
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"Do you wanna walk around the rest of your life lookin' like yourself?" -Shirley
"Do you wanna walk around the rest of your life?" -Laverne
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"If this be madness, then who needs sanity,
If you say no, I'll hafta stoop to profanity" -Lenny
"Awe, nuts" -Squiggy
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"Not bad for a long-haired weirdo, huh, America?" -Micky