I'm starting to get extremely frustrated with Carrara.  How am I supposed to build a scene when Carrara keeps creating a new document every time I try to add a new element to the picture.  I've played with the insert menu but inserting content objects doesn't seem to be an option.
     I'd really like to do something simple to start with such as put the hot tub onto a terrain and build a landscape for it but Carrara doesn't act at all like ANY other of the programs that I have (they all let you work on a single document and don't open anything you don't ask for).

Even if you're working on an animation you want to build a single scene as a start point so this isn't something the program shouldn't do.  It's already doing something it shouldn't do in opening new documents instead of adding elements to the current scene.