How i can give a more informtive output(Graphs)

HI all,

This is my first topic in this forum.
I have a test environment which has a fedora in it and i installed nagios 3.1.
I added windows clients into it.
But i am not getting informative outputs from it.
Can anyone tell me where i can edit inorder to get a more informative garph output.

Thanks
Renjesh Raju