You should be able to use the supplied USB cable AFAIK. I'm still waiting for Control My Nikon to come out with support for the D800E. He had been waiting for the SDK from Nikon. Last week he was waiting to receive a body to use.
Control My Nikon is very nice software at an incredibly cheap price of $20. We'll see if the new version is still that cheap?http://www.controlmynikon.com/download.html