tip: ActionScript 1.0 vs. 2.0

You don't have to switch to ActionScript 2.0 if you can't find a good reason to do so. Macromedia even says so:

"Using classes to store functionality is not the easiest or best solution for small applications or simple FLA files. When you build a small project, it is often more work and effort to use classes or external code files to organize ActionScript instead of adding ActionScript within the FLA file. It is often more efficient to put ActionScript inside the document. In this case, try to put all your code on the Timeline on as few frames as possible ..." [source]

Here's how you can ensure that all old ActionScript 1.0 techniques will work in your movie (open Publish Settings from the File menu):

There is nothing wrong with learning to use ActionScript 2.0 properly, but it may not be necessary for your day-to-day Flash projects.

If all you need is a little gotoAndPlay() -- then ActionScript 1.0 will get the job done!