i am about to start the framing of my basement walls and i have encountered a few questions:1) since the walls are not load bearing, could i go with something other than 16" centers (ex. 24"), 2) should i use 2x4's or would 2x3's work (less $), and 3) which is most perplexing; I have a french drain aroung the perimeter of my basement in which i have hung a vapor barrier from the center of the "trough" (drain) to the sill plate at the top of the concrete block. I have heard so much on this vapor barrier issue that after installing this v.b. I wanted to be absolutely sure this was correct knowing that the area behind the studs will be prone to moisture. Also the fact that this is the very beginning and want to start out right. Also any tips on how to proceed after this would be appreciated. Thank you in advance!

I have been told that I need to install a louvered panel or some sort of vent in the wall where my forced air unit is located. The vent will allow the unit to take in air properly and produce better flow. Does anyone know where something like this would be available and what the correct name for this vent is? Thanks in advance.