Very easy deathy17. You don't even need to use photobucket, or imageshack. All you have to do is:
1- Go to the main page
2- Go to photo gallery, which is listed in the navigation bar to the left
3- click on "My Gallery" in the top right hand side
4- click "Upload Photos" again top right hand side
5- Browse for the photo on your comp you wish to submit
6- Tada!
You only need photobucket, or my true love, <a href="http://www.imageshack.us">Image Shack</a> when posting photos in a forum. Reef Central helps you host your gallery. Also, if your file turns out to be too big, I like to use IfranView. It's very quick and easy. Hope I helped.