maverickngoose95:So, how do I get the picture I want to show up whenever I post a thread?.....
Are you asking how to add an avatar or a signature to your profile? If so, it's pretty easy to add either feature. To start, you need to go into your profile. You can do that by clicking on the profile link listed in the "Shortcuts" box or by clicking on your user name up in the top, right corner.
The first tab in your profile is for your signature and bio. In the box marked signature, you can type or paste in text or HTML including URL addresses for pages or pictures.
To add an avatar to your profile, click on the tab marked "avatar" and make sure that you have the avatar option enabled. Then upload your avatar by browsing your computer for the image that you want to use. Once you've found that image click "update" and then "save changes."
It can take a few minutes for an avatar or signature to appear so don't be concerned if your new signature and avatar don't show up right away.