Right click on picture>Properties>copy URL>selectIMG>paste URL>submit
Do not preview first. And yes, some sites won;t let you link.
That's exactly what I did with snapfish, then I tried adding the spaces and finally the jpg at the end of the link.
Right now I would say that snapfish won't let me link the pic, for whatever reason.
The photo that I got posted was with hp photo, now I just have to figure out the size issue.