Cheat sheet:
http://support.apple.com/kb/HT1220The ones I use most often are:
"Delete" == fn + delete
"Home" == fn + "<-"
"End" == fn + "->"
"PageUp" == fn + "up"
"PageDown == fn + "down"
"Print Screen" == fn + shift + F11
"Print Active Window" == alt(option) + fn + shift + F11
"Print Screen (mac)" == command + shift + 3, 4
"Print Screen (mac)" == command + shift + 3, 4
Note these are to be used in Windows with mac key board.



