Externally, VM techs will only work upto first floor height.
Other than that, I believe most options are possible.
Incidentally, if by new installation you mean you are having Virgin TV installed, then you'll be having a TV360 setup not a V6-based install. If you already have an existing TiVo or V6 box and are adding multiroom then that's a different thing. It doesn't make any difference to the mechanics of the cabling which are identical - but new TV customers don't get TiVo-software since several years now.
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