Assistance Requested with Flash Banners

I am trying to use flash to create banner ads that load when a page loads and gives the user the option to close them…actually not close them but make the ad disappear and leave some type of promo box that will allow them to click on it and restart the ad if they choose to do so.

The thing that is throwing me is I am trying to go from one size flash movie (for the advertisement) to the smaller movie size (which would be the promo box to reload the larger sized ad). When I attempt to do this, the area used by the second movie (promo box) is the same as the first movie (the ad). I assume this is because the object code I am inserting into my html is for the larger movie and it maintains that size.

Is it possible to vary the height of a flash movie?..if so how?

Am I confusing myself too much with getting this done or is there a much easier way to get this done.

I am wanting the ad to load over content on the page. I had tested using <div> layers and having the ad on one layer and the content on another. This someone works but I was hoping for a better solution.

Again, is there an easier way to do these pop-up type banners that the user can minimize/close.

Any help that can be provided would be GREATLY appreciated.