The top two fans will blow down onto the CPU and memory, while the front two, in combination with their forced induction, are drawn into the drafting flow across the hard drives and out the top right side fan.
All the circles with exes will be cut out using a 2" hole saw. You'll see what they're for later. Needless to say this power supply aint near powerful enough nor long enough leads, but the picture should be coming together for what's going on. The CD door will go right up to the bottom HDD fan, so i've used up pretty much every lick of space in the case.
If you're wondering why the fans are offset rather than centered, it's so that when the forced induction air meets the passively intakes draw, it will get drafted across whatever components are between the fixed wall and the service panel. OF course, in addition, the big fans will draw the heat directly off of the three most heat producing components- CPU, northbridge, and GPU, with a directly horizontal vacuum draft flow...from where?
Behind all those holes, the fixed panel will have passive vents. So the air will be vacuumed through those ventes, through the mobo tray, against the back side of the mobo (cooling the components from that side, see SATA controller, south bridge, CPU, memory), then down and around the mobo, then up and along the GPU before exiting. As well, it will go over the top, then down along the CPU and mix with the forced air before coming out the top left fan.