Installing new drivers... HELP!!

I have a x1400 mobility ati card and there are no new drivers for it :[

I want to learn how to install new drivers (such as the omegas).

I'm clueless on how to get rid of my ATI drivers and put in new ones.

Can someone help me? Maybe link me to a good tutorial site?

By the way I have a Dell Inspiron E1505 with a core 2 duo and a X1400 ATI mobility video card.

There are no drivers on the ATI site for it.

I'm just on my way out the door, so I can't explain how and where to find third party drivers. For laptop video drivers, why not download the most up to date ones from the laptop manufacturer?dmanrevived