Problem with unloading movies

Hi

I can't get my head around unloading movie clips, i.e. when to unloadMovie, when to removeMovieClip, or when to unloadMovieNum and all that.

Please take a look at the building site - URL . Click on the logo in the corner to bring up the control panel.

Click on Radio, then either on the Broadband or on Dial Up buttons. The radio player loads in a higher level, but I want those Broadband and dial-up buttons to disappear too, but I can't seem to get it to work.

The FLA file is at URL

Your note of what code needs to be added where would be appreciated.

I also need the Invisible Button (covering the logo in the corner) to be unloaded when it is clicked so that it doesn't interfere with the operation of the buttons in the control panel.

Finally, when a button in the control panel is pressed, apart from doing it's navigation thing, it needs to reload the Invisible Button (mentioned above) and also close the control panel down (which will be an adaptation, I assume of the script that the Invisible Button has.

Any help on these matters would be much appreciated. Thanks in advance of your help.

Martin