[sgl]

You can click on User CP (on the toolbar near the top of the page, 6th option from the left). When you select this, you will see a menu on the left-hand side of the page. One of the options is "Edit Signature". If you select this, you will be able to add or edit your signature. This is the quote that would show up at the bottom of your posts. After you set up your signature, you will see a small box on the right-hand side of the quick reply screen (the one that you type your posts in). It should have a check mark in it. The box says, "show your signature".

Hope this helps!