Look what I did...

[kittycats_delight]

Jen you can right click on it and get the url address. Copy that and then you need to go to user cp. then select edit profile. Scroll down to where it says signature. In the box across from signature you will need to type [IMG] paste the url address here

and then type [/IMG]. Click submit modification on the bottom of the page and you now should have your signature on the bottom of all your posts. Good Luck and let me know if you need anymore help.