How to load a movie just one time and no more?

Hi,
first of all, sorry for my poor english…

I’ve got a serious(?) problem, I tried almost everything but I’m at dead end.

I’ve created a full flash site. It’s just a simple, corporate site.
Four menu items:
-introduction
-services
-references
-contact

The first, second and fourth item is very simple. But the third (the references) is a bit complicated. When it’s clicked, two new menu items appearing. Let’s call them A and B.
When clicked A and B the button calls another movies, A and B reference picture galleries.
Both galleries are copyrighted, so I need to show the user:
Warning, the following content is copyrighted!
When the user clicks FIRST time A and B, the copyright text appears at the front of the appearing gallery. I put a button below the text, when it’s clicked, the text disappears, and the user happily browsing the picture gallery.

My problem:
Everytime I click the A and B buttons, the copyright MC always appearing, but it’s need to show just ONE TIME.

When the user is return the introduction, or services, or the contact and then he returns references, i just don’t want to load the copyright text again.

Anyway, the copyright text is an outer swf file, what I load to a holder, when the reference MC is loaded.

I hope I was clear.
Thank you for your attention!

Greetings from Hungary!