This question will be asked a lot I think, but I can't find the answer.
I created an album in ZenPhoto called "Beige-Geel".
The ID used in the url is album=beige-geel.
How can I find the ID to use in the shortcode in ZenPhotoPress to include my album in WordPress?
Everyone tells me that I have to go to the MySql-database, but there has to be a simple way.
Actually in Zenphoto terms the folder name/path (toplevel/sublevel/...) IS the id and the number is virtually not used directly. You can use the object model to get the database id of an item (for images it is printed on the backend entry though).
The ID is indeed the numeric ID of the row in the database.
Since it is cumbersome to get that info out of the database, the ZenphotoPress popup has a dropdown that will automatically insert a shortcode based on the album you choose. Have you tried using that?