The Voodoo team have done it again and released their VoodooPS2Controller kext. No longer is AppleACPIPS2Nub needed! The driver can be fully configured from System Preferences. Features include:

• 102-key keyboard support
• Mixed PS/2 and USB configurations
• Scrolling support on Alps trackpads
• Sentelic touchpad support
• Advanced Synaptics trackpad support
• Resolution fix for PS/2 mice

The current version is 0.98 and can be found on the Chameleon website here. Installation is as normal with kexts and advanced configuration can be found in Contents/Plugins/VoodooPS2Trackpad.kext/Info.plist and IOKitPersonalities/Synaptics Touchpad/Configuration.

Full credits on the chameleon website.

Source