I have always played this game until I installed my 7970. It worked fine with the HD4000 graphics on w7 64bit. I have CCC 12.10.
Here is where it gets wierd.
If the game is paused, nothing is effected. I can play just fine, kinda boring though.
But if a created a new park. It freezes the split second the Park Inspected 'spawns' in.
If the park already has a PI, then it runs, but very unstable. I have reinstalled many times.
Any help or tips would be appriatiaced, I don't won't to forget the game.
*Edit- I have NetOn2 and a few extra CSO's installed, vanilla or modded, same issue