Computer is really hot, please suggest direction of case fans (PICS)

Hi, My computer gets really hot when i play games. I have a Zotac GTX 560. It gets up to 78C in the bf3 beta testings. I might have seen the graphics card gets as high as 90C in BC3. The hard disk might also get really hot, im not sure if it's hot because of the hard disk spinning, or if the graphics card's exhaust is directly next to the harddisk. (not sure if the airflow of the graphics card), PLEASE tell me the airflow.

I also have a addon CPU cooler :http://www.newegg.com/Product/Prod [...] 6835103074 Cooler master 101. Not sure of the air flow neither. Please tell me the direction of the airflow.

THE PSU: [url=http://www.newegg.com/Product/Product.aspx?Item=N82E16817182022][/url] intake air from the bottom and exhaust through the left and the right(rear) of the psu , I BELIEVE , also not sure.

The fans that I have ordered are:
[url=http://www.newegg.com/Product/Product.aspx?Item=N82E16835185060][/url]

1 for the front of the case , and 1 for the back (replacing the 80mm)

THE QUESTION IS WHICH DIRECTION SHOULD I PLACE THE FANS, MEANING SHOULD I INTAKE FRONT, EXHAUST BACK? ALSO IS THERE A WAY TO CONTROL CASE FAN SPEEDS?

My idea is that since the front is really hot( where the hard disk is), depending on the cpu cooler airflow direction, i might have FRONT and BACK be exhaust, and have the holes or vent, on the side of the case for INTAKE? so the Center of the case can keep cool? (hopefully)

Here are the pics of my case:

GREEN OVALS = air vents (holes in case)
GREEN DIAMONDS = POSSIBLE FANS PLACEMENTS
RED MARKS = Hot air, really hot.

intake front/sides. exhaust out back/top.
to control fans, you can pick up a fan controller. there are a ton to chose from less than 30$ us.