you dont have to make a certain number of posts

al lyou have to do, is instead of using 'sig pic' and putting your pic in there, you use a image hosting site-i use photobucket. its free. and upload the pic into there, and then theres links-you want the html link, and you copy it, and paste it into the 'edit sig'/'your sig' box in the user CP. it doesnt do anything to the size of it, and you can put txt in the box too. i hope that helps you out