For lash 5 there is the thing called dot notation. I have just started learning ActionScript on F5 but here goes.
Instead of using "TellTarget" and the "/", in F5 you just use the "goto" action and paths are done with a "."
Example:
If you have a MC on the timeline of scene 1 and you want to manipulate the main [root] time line from within the MC, it would go something like this. [this of course is on the button]
on (release) {
_root.gotoAndStop (2);
}
You would use this same way to goto scene 2,3 or any scene but like HowardMarks said, lable frame 1 on the scene you are targeting or target any lable on the scene you want to go to.
Hope this helps, like I said, I am just getting into this myself so I hope it is clear enough and I hope I'm right[ish].
roda B-)