You'll need to change a registry entry...
Navigate to "HKEY_CURRENT_USER\SOFTWARE\Synaptics\SynTP\TouchPadPS2"
Then change the entry for "PalmRT" from 1 to 0
Exit the registry editor, and reboot.
Here's the text of my patch entry for the registry:
Windows Registry Editor Version 5.00
[HKEY_CURRENT_USER\SOFTWARE\Synaptics\SynTP\TouchPadPS2]
"PalmRT"=dword:00000000