Well since I have contributed to this thread exactly nothing, I will do one.
Q: I see people have pictures for their signatures at the end of their posts. How do I get a picture there too?
A: Since there isn't an option to just add a photo file in the signature menu, you have to hotlink the picture from somewhere else. Since hotlinking is not permitted from outside sites, you have to post the pic somewhere here and link from it accordingly. There is a thread located in the Site Help and Information section that is made just for hotlinking pics or click here.
Post your pic there and then right click on it and select "properties". When the box pops up highlight the URL address of the pic and "copy" it. Then go to your control panel click on edit signature settings and in the box, put [img*] paste the URL you copied here[/img*] (but remove the * when you do it).
Click on Update Signature and you should be in business!