stuart - all you need to do is click on additional options below the message reply box when you are replying, hit browse and insert the image you want to upload.
Archy136 - 650 tank filled only holds about 600ltrs (baffles take up some of the volume) so say 600kg, plus tank (50kg) plus poles etc (50kg max) leaves you over 200kg left on your payload.
Assuming 60 ltrs fuel (diesel, relative density 0.8Kg/ltr) = 48kg, you still have 167Kg available on your payload - thats 25stone! I'd hardly think you weigh that.
This is assuming you fill that tank, fuel tank, take all your gear and have been eating a lot of pies.