Go to this page to browser for more skins: http://jalbum.net/skins/new
Use the area on top of the page if you are looking for a skin with specific features or properties. You can what features and properties a skin has by looking at the symbols below it. Click on the skin to read more about it and view an example album.
When you have found a skin you like you can install it. Click on Install skin and then double click on the downloaded file. Select OK in both pop ups.