If you are reading this, you are likely in a frustrating position: you have installed Windows on an older Mac using Boot Camp, but you are missing the drivers necessary to make the hardware work correctly. Specifically, you are looking for the elusive Boot Camp 3.0 64-bit.exe file.
Provides the base Windows drivers (keyboard shortcuts, trackpad, audio) needed to run 64-bit versions of Windows 7, Vista, or XP on Intel-based Macs. Installation File: The primary installer is typically named BootCamp.msi Bootcamp 3.0 64-bit.exe Download
Information regarding its deployment and technical specifications can be found in Apple's historical support documentation and technical white papers: Boot Camp Installation & Setup Guide The Search for Boot Camp 3