player prefs

what script do I use to save the scean that was last open using player prefs I did read this http://unity3d.com/support/documentation/ScriptReference/PlayerPrefs.html but it doesent realy say very much. also how do I get it to go acros sceans.

Maybe this answer of mine could help you:

Consider that, in addition to what I said in that answer, you can obtain a reference to the last level loaded (as you asked) using

Application.loadedLevel