Need suggestion for case fan setup

Hi. I've arranged a few fans and spare PSU cables from a friend and now I want to perform some serious cable management and fan setup.

*dl.dropboxusercontent.com/u/18544696/Harshil2462.jpg

Now I have a total of 6 fans, out of which one is very greasy, so count that out.

I particularly want to cool ram, HDD and chipset. For chipset, I'll somehow fix the intel fan. One fan can be fitted at the expansion card slot.

Please suggest an appropriate fan setup and tips.

*dl.dropboxusercontent.com/u/18544696/Untitled.jpg

note: the case fan on side cover has a duct for supplying air to cpu.