After you have selected your "web site type" under the "Pages" tab, do the following....
1) Under the "Pages" tab, click "Add new page".
2) A drop down menu will appear, shaded in grey. Under "Title" type in the titile you want for your photo gallery page.
3) Under "Type", click the arrow and it will drop down, then select "Photogallery Page".
4) Click "ok".
5) "Apply" your changes, by going to the "Next step", listed under the "edit" tab.
6) When you are ready to add photos to your Photo Gallery Page, you should be under the "Edit" tab. Once there, click on the page you named as your Photo Gallery page.
7) Once you are on your Photo Gallery page, you will see a box called "To edit the Module "Photo" double click here". Double click there.
8) Follow the steps from this point on...