Splash screen

Can anyone teach me how to make a splash screen
,Now i have a created game when the game is builded,when open the game it will come out the (window configuration),so inside this window got (play) and (Quit).

so i wanted to create a (splash screen) descriptions for my game info,either show this when the game open or or show after the user click (play)

Means another window need to show the description for my game info.

I have no idea what to do,so can any1 help Thx

Maybe this helps: http://unity3d.com/support/documentation/Manual/HOWTO-SplashScreen.html