you can read about it here and there is a link
http://www.quiltingboard.com/t-52762-1.htm
Go to this link:
http://www.mylivesignature.com/mls_wizard1_1.php
and follow the signature wizard instructions.
Once you get what you want, then choose 'want to use this signature'
then choose the 'generate BB code', then 'generate code for my hand written signature'. When the code is created, highlight it and copy it to the signature spot in your profile