[ltp] Disabling moving/tapping touchpad but leave scrolling?

[Jiang Qian]

Hi All:
I use trackpoint exclusively on my T43, therefore I'm annoyed when I 
accidentally touch the touchpad and cause the mouse to move wildly.  
However I do find vertical and horizontal scrolling with touchpad edge 
useful when viewing large pictures or webpages.

Is there a way to disable the synaptic touchpad so that it does not move 
the mouse nor tap to create click, but still able to use as a scroll 
wheel on the edge?  I'm using Ubuntu Hoary 5.04 with custom 6.15.7 
kernel and Xorg 6.8.2 synaptic touchpad version 0.13.6

Thanks in advance for insights.

Jiang