in signatures or just to show something?
signatures is done via the control panel (top left of forum windows) using [ img ] link url [ /img ] (no spaces)
showing something is done the same way/coding in a post you make or attaching via the "Add image" option when posting a new thread or replying (clicking "reply" instead of using the text window at the bottom of posts)
that help? If you want more info it is available @
http://www.hstuners.com/forums/misc....&action=bbcode