to show your sig use the *show signature* box at the end of the post topic options box.
to show graphic pics of your choice look to see if html/ubb is enabled. then place the pic address inside ubb code. say you have a pic. it is (as it must be) on the web somewhere. right click on it and select the properties of it. there will be an address - like
http://mypic.com/ then put {ubb} {/ubb}around
it, where {}is []ok? should look like this- {ubb}http//mypic.com/{/ubb}
to see how someone else did it, to get a better understanding, choose edit post (for their topic/reply) you wont be able to edit it, but you can see the code.