Ok bud since you seem to be having some trouble, go here and follow same steps, except when it tells you to go to masks, instead go to layers and then the reest is the EXACT same. Instead of the masks under mask tab the masks are under the layers tab. Understand? well here yah go and if you STILL have trouble lemme know ok? And just PM so we dont have to waste a whole thread about it ok? Well lemme know!
http://homepage.ntlworld.com/zagz/tuts_scope.htm
-Sniped