Will you please advise me what to do with this very partial ceiling: only on the right and a small piece in the kitchen. How can it cover the whole room and kitchen?

http://www.mediafire.com/view/ddw2c7o2z ... .31.44.png

And as you're taking the trouble to answer this thread, perhaps you can also tell me how to put 2 roofwindows in the kitchen above the sink, when the ceiling is complete?