I don't see any framesets used on apple.com, so I'm not exactly sure what you are referring to. I think you made a good point though, with CSS you could utilize fixed positioning to simulate what a frame could give you.
I would strongly recommend taking the time to learn CSS since it just offers so much flexibility. DW should render proper CSS just fine, you might need to turn off some the helper icons (i.e. hidden elements, div names, etc)