As I learned from my experience, this is not possible. You need to have the provisioning profile generated from the same developer account which you want to use to publish to the appstore.
Basically yes, but look into the xcode 4 archive organizer. You can share an archive with another Xcode. From there it seems to be possibe to do a re-signing.
Since your client must use anyway his xcode for submitting to the AppStore, this might be a way to go.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.