This WHQL Signed driver unlocks multi-touch (2 Finger Scroll) in laptops with older Touchpads that doesn't originally support multi-touch.
Note: You need opened FTP ports otherwise download will fail!
Direct Download Link: http://bit.ly/HGQlok 

The amount of the feature you will get depends on the hardware version of your touchpad.
Typically you need version 6.2 above.  The screenshot below shows a Version 7.2 Touchpad: