Welcome to TerraForums. It's always a pleasure when CP enthusiasts from Down Under join us.
Since you are using Photobucket embedding photos into your posts is very simple. When you view your album or an individual photo you'll see a section that displays HTML and BB codes. Just copy and paste the IMG code into your message and it will display when the message if viewed.
If you are posting a number of photos use the gallery view check off the ones you want to post then from the bottom of the gallery click on the "Actions" drop-down and select "Generate link codes for selected". Then copy and paste the code from either the "Clickable Thumbnails" or "Full Size" boxes in the "IMG for bulletin boards & forums" section. If you into the advanced mode of the message editor you can preview your message and add captions or re-arrange the images in the post.
Note: the board is set to resize images over a certain size however in this case users can click on the image to see the larger size version.