Spoiler tags type deal with flash

Just wondering if anyone knows of any resources that could help me learn how to emulate a spoiler tag type effect for flash text?

I’ve looked at tree menus etc but seems a bit fussier than needed.

What I have is a very large piece of text with differing sections, rather than have a user swamped by everything at once I’d like to hide the majority of it with a brief intro for each section. A [+] / [-] button would expand and collapse the extra information when required (pushing the rest of the content down ala a tree menu type thing).

Any simple way to achieve this?