Flash positioning using CSS

I’ve just hit blank. For some strange reason, I just can’t get my head around this. And I’ve searched the internet, but nothing there either. So, where better to turn to, than the forum for the world’s smartest people? [Really, it is. I feel like a five year-old in a high school math class.]

Anyway, I’ve created a Flash site which I’m really proud of. Drop down menus and some really cool effects. And best of all, none of it’s dynamically programmed. Everything is just movieclip based. I’ll be posting it tomorrow in the Showcase section - there are still some pages I need to finish.

The thing is that the movie size is 1020x800, and I’ve only used 750x450. The rest is just a radial gradient. In IE6, it works fine. I’ve hidden the overflow, set the position to absolute, and it works great. But on another resolution than 1024x768, or in another browser - it’s pretty messed up.

So, how do I position the movie to be centered no matter what? I don’t need to set the clip vertically - it has to stay at the top. And I want the scrollbars to be hidden as well.

Any help will really be appreciated. I think the coffee’s getting to me.