Why doesn't touchpad scrolling work?

I have a D630 model PP18L with an X3100, I have everything working great except touchpad scrolling. Adding the AppleACPIPS2Nub and ApplePS2Controller from this kext pack as well as the ffscroll daemon just causes my trackpad to go nuts. It will sometimes scroll with just one finger, sometimes it wont respond at all! How can I get my trackpad to work properly with scrolling?

Also, is there a way to enable the trackpad prefpane with this trackpad? I also want to disable tapping, how would I do that?