In the upper right hand corner are various "Actions". Home, Profile, Register, etc. Click on Profile. This is where you can set various forum related options. What you want is the "Signature" field. Data stored here (text, links to pictures, etc.) are automatically added to the end of every posting you make. This is where we all put the information about our rigs, trucks, beliefs, memberships, and so forth.
I have found it is easiest to go the "Practice" area (
http://www.montanaowners.com/forums/...isplay.php?f=7) and make a posting with the information you want to eventually be in your Signature. By making a posting you have access to all the formatting tools you need to include pictures, change the default font, set the color of the text, and ?? The Preview function will allow you to easily see what the signature will look like. Once you are happy with the content, cut/paste the data into the Signature field in your Profile. Subsequent postings will automatically pick up the information you have stored.