Create Flash Button

All righty, I’m very new to MX 2004. I have no idea, how to do what I want to do. Basically I have 1 layer with a 900 frame movie. I want to know how to at the end of the movie (preferable the last 4 frames) how to make a button that says enter, and when you click it, it takes you to a link.

If you know, it’d be appreciated.

Thanks

The frustrated Flash User