Seperate Cores for applications

Hey guys, I need a question aswered!

I downloaded America's Army for my MBP a while back and I can't play it too good. It has terrible FPS (like...2!!)

This is probably because the game doesn't support Dual Core processors too good, so I was wondering, how do I set my CPU so it works with this game. Sounds wierd, but I'll put it this way.

Is there any way that I can set America's Army to run off one core?

Thanks in advance.

Peace

...anyone?

No, the game would have been programmed to use multiple threads and its the job of the OS to assign threads to the core(s)