You can check out the SMACNA (Sheet Metal And Air Conditioning Contractors' National Association) web site - (http://www.smacna.org/). However, you will have to purchase technical guidance documents from them.
The same holds true for the American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. (ASHRAE) web site: (http://www.ashrae.org )
For info on installing a VAV controller, check out this pdf:
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Eventually, one needs to realize that it is far less important to be the smartest person in the room than it is to sit next to that person and make friends.