Well the first question is yes... As you would T your air intake for you skimmer and in essence there would be some suction as well as pushing from the unit. I think it would work fine, but I wonder why you couldn't put the generator closer to the skimmer, just for the sake of less ozone-safe tubing
The second one I would likely say error on the side of caution and trickle it over the carbon... I'm not an expert, in fact I've never ran one, but I've been reading up on it as I'm planning on getting one for my system... There are likely a few people who can really answer that one here with certainty...
Here are two links I have found invaluable though:
http://reefkeeping.com/issues/2006-03/rhf/index.php
http://reefkeeping.com/issues/2006-04/rhf/index.php