This is why I recommend AT LEAST an external mouse (USB\bluetooth), as these settings do not effect the external mouse\keyboard at all
Other synaptics\alps trackpads will differ and you must edit the plist with trial and error. The attached plist is currently 'optimized' for the m1330. I take no responsibility for any damage done, it is pretty safe and easy to revert back to normal, be sure you backup your extensions. Please post your findings, your laptop model, and settings that you used. This operation was performed in Apple Mac OS X Leopard 10.5.2, I cannot guarantee it working with different OSX86 versions or different laptops. This should work on most laptops, as they either have synaptics or an ALPS trackpad, I would do some research to find out which one you have. I highly recommend an external USB Mouse and Keyboard, just incase something goes wrong.
This will allow you to scroll from anywhere on your trackpad ala macbook! After trial and error, I finally got it to 'acceptable' speed and settings. I feel that this feature has been overlooked and is one of the nice features of a macbook.
After going over 2 year old threads on the ALPS and synaptics 'hack' that allowed 2-finger\1-finger 'anywhere' scrolling and no one being much help on getting it to work on recent generation laptops and leopard, I decided to test it out myself.