[CentOS] CentOS4 laptop touchpad erratic operation

I've just put up CentOS4 on my HP ze4630us laptop, and the
installation produced only two problems of note, both related to X
operations.

1. The installer refused to allow 1024x768 resoultion for the screen.
After install, manually setting the resolution in xorg.conf was no
problem.

2. Erratic touchpad operation. This unit has a synaptic touchpad. I've
also noted similar problems on my previous Gentoo install (also 2.6
kernel and xorg). Never really resolved this. When scrolling across a
screen in a browser panel where there are multiple links, the mouse
will trigger click operations all on its own, so it's difficult to
reach the link you want without inadvertently opening another link
that you scroll past. In googling, I didn't have much luck finding a
matching problem; nor did I have much luck earlier. Most of the
problems reported seemed to be "touchpad unable to respond to clicks",
i.e. the opposite of my problem.

The installer generated the following mouse definition in xorg.conf: 

Section "InputDevice"
        Identifier  "Mouse0"
        Driver      "mouse"
        Option      "Protocol" "IMPS/2"
        Option      "Device" "/dev/input/mice"
        Option      "ZAxisMapping" "4 5"
        Option      "Emulate3Buttons" "yes"
EndSection

Has anyone else seen this type of problem with a touchpad, and does
anyone have knowledge of a fix?

TIA,

-- 
 Collins
       When I saw the Iraqi people voting three weeks ago, 8 million of them, 
       it was the start of a new Arab world.... The Berlin Wall has fallen. 
               - Lebanese Druze leader Walid Jumblatt