You have to put them on a server on the internet and then post the image link to where you put it.
Or you can just do what everyone else does and email them to Ulter or RADAR to do it for you.
Find a site that allows free web hosting, theres plenty if you look around, then upload your pics to the site and copy/paste the link(right click - properties) and paste the link here, or preferably insert the link into the