Lenovo 3000 G430 touchpad Problem with ubuntu 8.10

I had a problem using touchpad in ubuntu as it was not working, so I searched on net and find that we have to enable SHMConfig. First, open your terminal, then type this comand:

sudo gedit /etc/hal/fdi/policy/shmconfig.fdi

Copy and paste this into the file:

Copy and paste this into the file:

Copy and paste this into the file:

<?xml version=”1.0″ encoding=”UTF-8″?>
<deviceinfo version=”0.2″>
<device>
<match key=”input.x11_driver” string=”synaptics”>
<merge key=”input.x11_options.SHMConfig” type=”string”>True</merge>
</match>
</device>
</deviceinfo>

Save and close gedit then reboot the machine. But it is not yet done...just press fn-F8 and u r done..
I have not yet installed ubuntu 9, hope problem would have been solved...