Not really. There's no need to check if the Windowed3d() function returns true or not. You don't care if the videocard supports windowed mode, because you're not going to use it.
And what the heck is the type for? You've defined it and never use it.
If you want your game to load fullscreen, you only need the one line Graphics3d 640,480,0,1
And what the heck is the type for? You've defined it and never use it.
If you want your game to load fullscreen, you only need the one line Graphics3d 640,480,0,1