Excel 2007 : Excel conditional formating HELP!!!

Hi,

I am using excell 2007 and am having a few problems with conditional formatting.
I am trying to do the following.
i have 6 cells in 6 columns ( c2, d2, e2, f2, g2, h2 ) each with figures 17.14+
Now i am trying to add a formula so when ever i insert a number in the cell below e.g c3 i want the cell c3 to turn green or red depending on the value in the above cell (c2).
so in all:

c2 has the value 17.14
if i insert the value 17.14 or less in cell c3 i want the c3 cell to turn green.
if i insert the value 17.15 or more i want the cell to turn red.
now i know how to do this in the conditional formatting feature but i want to do this will all the cells refering the the cell above.
i also do not want to create 6 diffrent conditional rules.

Is there a formula i can use that can be pasted into each cell and the cell number edited?