You all have been very helpful in the past so I am asking one more time for help:

I would consider my self very handy- I have done more than my fair share of projects so I am confident in my ability in being hands on.

The project ahead of me is remodeling (rather just refreshing) my current bathroom.

I plan on talking all the walls down to stud and starting from scratch. Keep in mind the bathroom is only 6 x 9 at the most so it should not be too daunting a task. When I fist moved in I had most of the plumbing changed to new copper from old galvanized so the only think I will need a plumber from would be to hook up the new shower assembly.

Enough of my rambling- my questions:

1) I plan on tiling the shower/bath tub area but plan on leaving a couple of feet of drywall at the top (not tailing all the way to the ceiling). Do I need to mud the cement board seams?

2) When I install the cement board do I install greenboard for the remaining foot and a half? How should I joint the cement board to the greenboard then?

3) Should I install greenboard on the ceiling? (I have a exhaust fan but thought the greenboard might add some more moisture resistance?

4) In keeping with the greenboard thing. Should I install greenboard on the remaining walls as well? I plan on painting them.

Thank you, in advance for your help.

Ken