Are you using the newest/updated version of bootcamp? Older versions didnt work right with windows 7.
I would go ahead and try downloading windows drivers for the 9400m (assuming thats the model you have). The chipset used on the macbook pro is also used in many PCs--so you should be able to find it easily.
Nvidia drivers site: http://www.nvidia.com/Download/index.aspx?lang=en-us&ptid=1&psid=52&pid=0