iStat pro (or similar) for Vista?

Is there an equivalent for iStat pro for Vista? I'd like to monitor my MBP's temps while gaming. Thanks for any help!

I use Systool on my desktop PC, There is another one called Speedfan. I recommend Speedfan, however. Its easier to use.

Be aware that most of these programs usually don't work on OEM machines and proprietary motherboards. You have been warned! Its worth the try!