Here's an image posting guide!
You will need an image hosting site to upload your photos into the forum.... some of the most popular
Photobucket
Fotki
Webshots
TinyPic
Imageshack
My favorite is Photobucket as it's the easiest, although Fotki looks the most professional or has the best layouts for displaying pics. There's a lot of other sites but in short, below is how to post an image....
This
[img]http://img.photobucket.com/albums/0903/MonicaNFids/Charlie-Saurus/4e65b419.jpg
[/img]
Equals this
This (if you have rather large images)
[url=http://img.photobucket.com/albums/0903/MonicaNFids/Charlie-Saurus/4e65b419.jpg
][img]http://img.photobucket.com/albums/0903/MonicaNFids/Charlie-Saurus/th_4e65b419.jpg
[/img][/url]
Equals this (click to enlarge!)
Or in short....
[url=image url
][img]thumbnail%20url
[/img][/url]
That is, if the image you have uploaded has a thumbnail image.
And that's Charlie, a 13 year old mitred conure!