Flash & frames - with CSS?

Hey -
People keep crapping on about CSS - even a random drunk woman at a party on the weekend told me to get to know it… anyway… :z:

I am well aware of how to get my swf to control content in another frame using the traditional html frames method.

Can the same thing be done with CSS?
Do I need a frame for flash to control?
Can CSS have frames?

Any wisdom would be very cool.