You may get a warning on the size of your sig being to large, usually it will resize it for you if I remember correctly. You will need to go into your preferences and edit your signature to upload it. One uploaded just do what N8R said above.
__________________ 2003 Cobra Vert (Redfire) #3938 of 5082 @ 05/27/2003
472rwhp/493rwtq -Modification List - Dyno Sheet 2012 Mustang 3.7L M6 (Kona Blue) 2011 Ford Edge Sport (Red Metallic)