Please Don't Hate me but i need Full Screen Help

I have scoured this site and other sites for the basics on how to plan and create a full screen flash website. None have quite exactly what I was looking for however. This is the general idea:

http://www.jeanmalek.com/#/fashion/fas37/0

http://www.bwadesign.com/default.html

http://www.organicgrid.com/#/portfolio/01

The images take up the entire monitor even on different monitors, but the crispness of the images is always consistent. It looks like the same premise on all of these websites so is there a particular way to go about it? I know the whole process is probably crazy intensive and my actionscript knowledge is sadly very small. Can someone explain to me the basic overview and perhaps point me in the direction of a tutorial that would explain this mysterious process? I apologize ahead of time if there were existing tutorials i missed.