As we all know, Aperture creates an empty library every time we start a new one. There’s no such thing as a “Project Preset”. This is a problem for many of use that like to create elaborate Projects that contain Smart Folders, Albums, Slideshows, Books and other useful things.
This is especially useful for people like me that routinely have audio attachments, video files, and stills on any given shoot. I also like to have five Smart Folders for every star rating.