I have a Lenovo notebook (Win 8) with a touchpad that's manufactured by Elan (aka Elantech).
I've previously used a Synaptics touchpad on my old notebook and have gotten accustomed to its features like Momentum which allows you to control mouse movement by flicking your finger across the touchpad surface.
I read on a forum somewhere that Elan and Synaptics use similar hardware but I couldn't get Synaptics drivers to work with the hardware (generic Synaptics drivers also didn't work) and I wasn't sure that modifying Synaptics' driver configuration file (INF driver file) to add an entry for Elan touchpad's hardware ID would be safe.
From another forum I found out about this registry key:
Changes to DWORDs within this key would enable or disable several features of the touchpad that were otherwise not customizable from the ELAN driver configuration utility under Mouse Properties in the Control Panel.
I was able to enable several features that are found in Synaptics devices by editing DWORD values in the Registry but I could not get Momentum to work. Some "Momentum" related DWORDs I found were Momentum_Display, Momentum_Bounce_Enable, Momentum_Enable and Momentum_Slider but changing their values doesn't seem to do anything.
If your notebook has an Elantech touchpad and you got Momentum working, please help.