The database is really easy. Just go to it and look to see if there is already an entry for you variety. If there is just click on add a photo, when downloading your photo there is an info box, that is where you will put the date the picture was taken. If there isn't an entry already for one of your Sedum, it is very easy to add a new variety to the database. After you add the info into the fields I will go in and okay them. As soon as it shows up in the database you can add your pictures. : )
If you don't feel comfortable doing a new entry just let me know what Cultivars you have and I can add them for you. Then all you have to do is add your pictures. Did I make this clear as mud? I'm really good at confusing things.