Want to add a photo to the group pool? First you need to join the group by clicking the "Join this Group" link below the group name. Then, to add a photo to the group, go to the photo's page and click the "Send to Group" button between the photo title and the photo. Then choose the group you want to send it to, and you're done!
Want to order prints? Click the image you wish to order prints for, then click Actions -> Order prints and more.