LinuxQuestions.org - Emulate wheel-scrolling with logitech trackball

Hi guys,
I have just received a logitech trackball (T-BC21) and it all works fine out of the box except the wheel-scrolling emulation (the trackball doesn't have a wheel).
I had a good look around and came across a few sites. ON this https://help.ubuntu.com/community/Lo...olling_Example it tells you what to do

Quote:

To enable vertical scrolling while holding down the small, left mouse button (button #2 in the image), change /etc/hal/fdi/policy/mouse-wheel.fdi to:

but alas I don't have any hal folder in my file system. So I did a bit more research and found this one http://www.thinkwiki.org/wiki/Instal...ith_Trackpoint which essentially tells me to create a new file

Quote:

Create a new file called /etc/hal/fdi/policy/mouse-wheel.fdi typing:

The issue I have is as I said the fact that there is no hal folder, so after having created the file and pasted the content in it, is it safe for me to create the various folders that will ultimately contain the file hal/fdi/policy/?
thanks