Catche problem

Hi all,

I have a problem with a website because it keeps the old configuration in the catche and the visitors that are coming back don’t see the updates.

It is a possible to resolve this problem?
I heard that if i make a container for the main website will resolve my problem.

For example if I will make a start.swf to load main.swf will work.
It will work?
What loading script shall I use?
It is a special script for this?
Anybody have an example for the loading script?

Thanks for help!
Cristian