I've got a Zalman Reserator 1 Plus and during summer when the temps got a bit hotter (like 40+ C outside) my system was running a little on the hot side, so I made a ghetto fan booster for the Reserator tower. It's pretty slack, but it does the trick on hot days. I only stick it on when I need it cos it just slides right off. The fan is sucking the air up through the fins and exhausting the hot air out the top.
and yes, that is a Crunchy Nut Cornflakes box
What do people think? too ghetto? I was toying with the idea of making a plastic version, but now that summer is over I rarely need to use it anyway.