If anyone is looking for separate Mac Drivers for the Microsoft Internet Keyboard Pro and Intellimouse, try this link. On that screen set (1) to Desktop Set, (2) to Microsoft Wireless laser Desktop for Mac, (3) to Mac OS 10.2.x-10.5.x, and (4) to your preferred language. (This URL should take you to the US download page for both keyboard and mouse drivers.)
I discovered the URL link for the separate keyboard and mouse software by accident when looking at the Microsoft 6000 Laser Mouse.
My previous attempts at trying to find Microsoft input software only managed to find software for the combined keyboard/mouse, but this download page let me only install software for the mouse without the keyboard.
