[Toadling]

Absolutely. Action groups are extremely powerful in planning projects. You can layout some really complex series of actions if you want (not that I'd ever waste precious time doing such a silly thing ;-).

Anyway, your "Cooking Project" might look like this:

Prepare Meals (serial project)
    - Buy eggs
    - Prepare dishes (parallel action group)
        - Make omelet
        - Bake cake
        - Prepare meatloaf

By making your project serial, only the "Buy eggs" task is available initially; everything else is blocked. Once you complete the "Buy eggs" task, however, all the tasks in the "Prepare dishes" action group become available because it's set for parallel execution.

BTW, what you refer to as a "nested project" is officially called an action group. It's similar to a nested project but isn't really (hence the different name).

Hope this helps.

-Dennis