Amazing flash websites - How the hell they were done?

Hi all,

I’m trying to figure out how this both websites were done in flash. They are both amazing , so even if you’re not a flash expert to help me, it’s worth a visit.

The first one it’s done with actual videos or photographs from the real world:
http://www.ikea.com/ms/en_US/rooms_ideas/ckl/default.html

This other was done with art work, it’s 100% scalable to fit your screen resolution and I don’t understand how can they zoom in so smoothly in the images without loosing the picture quality…

Any hint could be useful, as I want to adventure myself in similar (but smaller) projects.

Thanks!!