A simple way to do this is to label your frames then use
gotoAndPlay("LabelOfFrameToPlay")
with the quotes. Then you don't have to change the frame numbers all the time to add or delete frames. If your frame is in a different scene you need to either specify the scene by number
gotoAndPlay(2,"LabelOfFrameToPlay")
//Where 2 is the scene to play
or
gotoAndPlay(nextScene(),"LabelOfFrameToPlay")
//'cause nextScene() is a function not a property.
hope that helps.