Go to "user CP" up at the very top, then go to "edit signature" on the left. To put a picture of your truck, insert the code from the picture you want to use off Photobucket. But the picture you use needs to be resized to around 400x? Then, for the info about your truck, type that in above or below the [IMG] code. You can click "preview signature" and it'll show you what it looks like, Once you're happy with it, click "Save Signature"