Please help me with my g4 case mod.

Hello, this is my first time posting , but i've been lurking around for a long time . I recently got a part time job so i have money to buy some nice toys and recently bought:

-P4 prescott 3.2
-BFG 6600gt oc

I recently won a g4 graphite case on ebay and read many articles about moding it to fit a pc into it, but most of the articles only have old video cards and 2200 athlon, so i have a few questions about the cooling i should use. i have the following heatsink :



and i also plan on getting this one for my 6600gt since i get some artifacts on my current pc .... mind you i only have 1 out take fan....



Here are some pictures of the g4 case so you get an idea with what i'll be working with.






as you can see it has a fan blowing at the pci/agp ports and it has handles to elevate it "probably all of you already knew this, but still" Also, theres is no way to put a fan on the back or front, the only options are the bottom and top, so what do you guys recomend? Put an intake 120mm fan at the bottom and a 120mm outtake fan at the top? you guys think this will do to keep it at a nice working temperature? btw, i will have a 300gig hdd in there and a dvd drive, thx in advance.

Just to warn you.......this is ALOT, and I do mean, ALOT, of work to do.

Can't wait to see your version of it though, since everyone seems to do things differently. I have a case sitting in my room waiting for the same thing, just too much going on atm do do it.