You take the pictures.
Put them on your fileshare.
Go to halowaypoint.com
Sign in and go to your halo reach file share
Then you will see the pictures.
Open up the pics
Copy the URL
Go to the website
When your posting your pic you should see a icon of a picture with a plus sign on it it's right up on the toolbar of another icons like YouTube, changing fon't colour, and picking a fon't size.
You pick the icon with the picture and the plus sign and then you paste the URL where it is required and then you put the desired width and length.