Fan Speeds in Win XP

Anyone know how to access the fans when using Win XP through Bootcamp. None of my Win programs work. Pgms register the CPU, HD, and memory but I can get any readings from the fans. Right now the only way to change fan speeds is through OSX which I don't use very often. I'm also looking to overclock this beast (Intel ProMac 2.6 dual core X 2)..........anyone got any ideas?
Thanks

Use this program ----> http://www.olofsson.info/index.html?inputremapper.html

You can alter the fan speeds as well as other things...

Thank you but....a question

Thanks question answered after I read instructions.