I've found a work around, I can now play it smoothly
However, I have to play without puddles or with wheels on vehicles
There was a config file, one of the parameters was "fix_directx=0" So I changed it to 1 and things were fixed. However, got to a level that was raining and it was still bad. Turn off puddles, problem solved again. unfortunately turning off puddles took the tyres with it :S
I think if I wanted to fix this, I'd need a new GPU. no joke. in the game 'beyond good and evil' I have to have water effects set to lowest, as explained here
. ok the website is really old but im still getting that problem. must be the same thing with urban chaos puddles.
I'm just glad I can play it again