To post images:
First:
Host the images - You can upload them at sites like: http://imageshack.us/ and http://photobucket.com/
::recommends photobucket::
Then (after it's uploaded) copy the image url
1. Use the thumbnail if it's a bigger image
2. Use direct link if it's not too big
When/if you use direct link, you have to paste the url into [*img][/img*] tags. (Remove Astrix's!)
Then it should show up here.