Very quick guide to posting gallery pictures to the forum:

1. In the gallery, browse to the photo you want to put onto the forum
   
   
2. Click in the BBCode text box which corresponds to the size of image you want (if you're not sure, use just BBCode, not BBCode Full Size)
   
   
   
   
3. Your browser will automatically select the entire contents of the box
   
   
   
   
4. Right click and choose Copy from the popup menu
   
   
   
   
5. When posting a new message or reply, right click in the message entry area and choose Paste from the popup menu
   
   
   
   
6. The picture BBCode will then be pasted into the entry area
   
   
   
   
7. Finish off your message as normal, press Submit and... tada!