If you want custom cream panelling built from scratch, it is likely to take you more than three weeks to line up a contractor, get it built and then painted. If you want to use beadboard (thin, lightweight, cheap) you can do it yourself if you are good at the small precision cuts around the wood window trim and behind the radiators. You can get a custom built wood cover with doors for your tv or use the painting over tv disguise made with hinges. I think the room is beautiful as it is. Spend some money on a truly beautiful, impressive chandelier, have it centered over the table. If you want to impress relatives at an event, the chandelier is the way to go. Clean the windows for extra sparkle. If you are in the US, try Home Decorators http://www.homedecorators.com for DVD storage cabinets that are closed. I would not get a rug for this room unless I was ready to get it cleaned frequently and I could find one that looked good with dog hair on it and did not show stains. A good quality, highly patterned wool Oriental rug will do that job nicely. Such a rug is an investment and may take longer than three weeks to find.

Nice art but a bit too large for this spot. See how the frame is above your door frame. If it were mine, since the door appears to open into the next room, I'd consider modifying the sideboard to be used as a rad cover and lower the art so its center is 5' above the floor. It can stand on its own, and you can paint the frame the same color as the sideboard to unify them and the space. You might also add an art light that attaches to the piece for more evening interest.

Well, you can't do much about a window! Dressing table is good, as well as hooks, and/or shelves on the wll to the right of it. About all you can do for regular closet storage will be all along that (newly) straight wall to the left of the window, because everything else is constrained by the needs of the pass-through. You might be able to run a shelf along above the two doorways, for a little extra, but it could end up feeling a lot like a tunnel for the entrance to a master bedroom. I'd suggest making at least half of ht ehanging space be double-rod (half-height) for more capacity, and make sure that part of the dressing table has some drawers. That's about all there is! :)

Morning You say that privacy isn't an issue so I would dress the main window and the small window on the left hand wall with roman blinds. I would mount the blinds outside of the recess t make more of a feature and not steal any of the light. Regarding the two narrow windows I would leave them undressed and get two matching vases, ornaments etc and place them on the window sill to make a feature. I think that blinds would be too fussy and would detract from the rest of the room. If you wanted privacy you could always add some frosting to the two narrow windows The furniture you've chosen is beautiful I'm sure it will look fab! Really hope this helps, good luck with the rest of your project!