Controlling the order in which your game loads?

Is this better done with one event sheet or do you add an event and say when such event happens, load next layout? What I'm asking is, I want to have a start screen, a menu and all of the levels of the game with everything that comes in between. What is the best way to sequence this right?

I usually have the start screen and any menus(not in-game UI) on the same layout then the game loads in another layout. You can have each menu on a separate layout if you want but I find it easier to just put the sub-menus into groups or individual layers and enable/disable them when required.

Thanks — - anyone else have a different approach?