Tutorial: Tinted Windows
Simple 3 second mod here....
Tinted Windows  Difficulty - *
		Get ready for some pimping action ;)
		Go around the outter edges of the windows with the lasso tool (L).
		Then go to image>adjust>brightness/contrast and lower the brightness.. DONE!
		Or if you fancy some Jap style tints why not go to image>adjust>varitaions and add colour to the selection.