Only members are allowed to download photos from the photopost gallery.
What members do is browse the multiple photos and when they find one they would like to download, click on Photo Options located at the upper right and click Add to Favorites
Once you have all your photos added to your favorites click on My Favorites found on the upper left.
There you will see all your photos and have the option of clicking the disk to download them all as a .zip file.
Once you click on the Disk you will see the prompt to download the photopost.zip as shown here
Now that it is done downloading, go to the folder you have downloaded photopost.zip and extract. You will now see all the photos available to you to do with as you wish
That’s all there is to it.