If it's stupid but works, it isn't stupid.
Как работать со спрайтами
http://www.w3schools.com/css/css_image_sprites.asp
http://html-css.info/2009/07/css-sprites/
Генератор спрайтов http://csssprites.com/
http://www.w3schools.com/css/css_image_sprites.asp
http://html-css.info/2009/07/css-sprites/
Генератор спрайтов http://csssprites.com/