I have this case, allbeit in a much modded form.
How it's "suggested" to be fitted with fans, is to have a side 92mm intake on the mobo side *blowing at the processor/gpu*, exhausted with a 120mm fan in the front (blowing out obviously). On the drive side, 92mm fans blowing in *from the back, over the HD's* and merely exhausted by air moving over to the mobo side and leaving with the 120mm fan, and through air pressure pushing out the empty 5 1/4" bays (they are vented).
In other words, it's a pretty crappy setup, stock. However, the guide here on making a "Black Ice" or whatever it was called, has a much better way of going about it. All it takes is a bit of work with a dremel. Even if you did what
Wahoo Computers did, you'd be having a case that breathes much easier.