I'd just say it was a laptop specific issue and whats a 7500c graphics card is it ATI radeon based?? I've noticed that in my experience with the mod it seems to run slower on ATI based cards, I have a GF3 ti200 (nVidia) card that handles everything turned up pretty well until it gets stupidily bogged down with hundreds of ships, lasers, torps etc. Don't forget the warlords isn't just a basic HW2 conversion really it's a different game altogether just on the same engine and tbh to get it to run like HW2 would you'd need a beast of a machine. There is no real way to fix you problem really because laptops are hard to upgrade unlike a PC and thats where they start falling down imo. Hope this helps in anyway shape or form... storm...