I've never owned an ATI product so I don't know anything about where to get their older drivers, but there will be a link on their website.
Also, looking at your second picture I would say it is artifacting, which would be a heat related problem or your card is simply on it's way out.
Oh I just looked at your specs, holy shit a P4

You sure your system can even handle it? I mean I'm running a Q6600 and 8800GT and it lags when shit gets real.