Disable selecting with trackpad?

[Ross Gohlke <ross@grinz.com>]

Greetings,

I have a Powerbook 12" 1.5GHZ. I am using XFCE as my window manager. I 
am running kernel 2.6.26.2 with Debian Squeeze.

Is there any way to prevent the trackpad from being used to click? When 
I move my mouse across the screen with the trackpad it frequently clicks 
on things and selects as I drag. My trackpad is worn out, so using a lot 
of pressure doesn't work very well.

I have set Drag and Drop Threshold and Double Click Time and Distance to 
maximum in Settings > Mouse > Behavior. I have also tried changing 
Feedback and Threshold for both Configure and appletouch under Settings 
> Mouse > Devices.

I turned this "feature" off under Mac OS X. Is there an equivalent (GUI 
or CLI) under Debian?

Thanks,
Ross Gohlke