Hey Craig,
To add photos to an existing album make sure you are logged in to the photo page. Eventhough I was logged in to the forum I still needed to log in on the photos page. In the top-right corner it will either say 'log-in' or 'log-out', use your regular username and password to log-in if you aren't already. Then find the album you want to add photos to and click on it. If you are logged in, there should be a drop-down menu titled 'admin' in the top right hand corner. Click on it and you will see the option to add photos. You can also add a new nested album to your existing one which would allow you to group all of your photos within one main album (see Marek's album on the first page).
Hope that helps,
Iain
