so that air cooled hood would replace the 4 sided horizontal reflector that comes with the 400w system? and im guessing the filter is optional.. depending how much stank i want.

i found this on their ebay page:

20x36x64 Grow Tent
GROW TENT 20 x 36 x 64 CABINET HOME ROOM BOX HUT HYDRO - eBay (item 180196804270 end time Feb-15-08 12:24:56 PST)

Air Cool 400w HPS Grow Light
AIR COOL 400 watt HPS Grow Light 400w hood lamp fixture - eBay (item 180063500670 end time Feb-05-08 13:46:38 PST)

/\ is that the hood youre speaking of?

also, the inline fans just go in one of those pockets built into the side of the tent?