One of it explained haw to meake good shots of the scene.
He talked about "tecnica dei terzi" (Sorry, I don't know how to translate it, but I put here a pic!)

Her said the "target" will be near one of the line intersections, to make it better.
So I tought that it will be a good add-in for ASP...
I already tought to make a layer with those lines and make it immune to camera movents, but I find it so unconfortable...
Someone can create a script, like the grid, that make visible a camera-fixed grid like it?
*UPDATE*
I finally found this for better explanation!
http://en.wikipedia.org/wiki/Rule_of_thirds