I have this mouse: http://www.pointofview-online.com/showroom.php?shop_mode=product_detail&product_id=45
And I can't find any driver. But my system properly handles it as an USB HID compatible mouse, I think this is why there is no driver. I just can't configure the 2 additional buttons. So I think I would need an universal USB HID driver with which I could use that 2 extra buttons too. And sorry, but I can't find any by Google.
I'm using Windows XP SP3.