Enter your hardware in the box, and download the drivers. This can be done with any hardware, just go to the manufacturer's website and get the driver.
If there is no win7 driver then most Vista drivers will work. If that will not work then you can try the XP drivers, but no guarantee there. If no drivers work Win7 will load default drivers which will do fine, just be aware that some 'advanced' features of the board may not work properly, but most things will work fine.