bollox how do a post a pic if its saved on my pics on my computer? thick as fuck i know...sorry
When posting (not through the quick reply box) there's a link that says "Attachments and other options", hit that and then "Choose File". Browse to the picture on your machine (make sure it's not too big though, > 200KB), write your message and hit "Post".
Otherwise you could look at uploading to photobucket.com or similar and then link the image into IMG tags in your post.