There was news before that pre-2005 Apple portables/laptops had “w-enhanced” keyboard hardware. A hack was made available, which can enable two-finger scrolling on these trackpads.
The new 2005 Powerbooks have hardware scrolling features too, but do not necessarily mean they have the same type of trackpad as the pre-2005 models do.
Anyways, when news first came out about a month ago, I tried it. My system hung, good thing I prefer navigating using the keyboard, so that problem was quickly solved.
Today I tried it again, and this time it worked. But I found myself going back to SideTrack after a few hours. The rest of this post is input that I hope may help other people in trying out the said hacked drivers.