Limiting CPU Usage of a program

Hey all,

I've been playing some of my old games from almost a decade ago (TA) and I've been noticing that, even they don't need my full system power, my CPU usage is up at 100% while I'm playing.

Given the heat right now, I'm wondering if there is some way to limit how much CPU usage a particular program gets under XP or if there is a program out there that I could use for this.

I've got a 2.3 GHz Athlon processor running a game that was designed to run on systems back in 1997. It doesn't need all that power and is just heating the entire system up.

Thanks for any ideas on this.