Help! Running too hot!

Hey, I'm new and I have a question.

First off, for background, I'm running a Soyo KT-400 Dragon Ultra (Platinum) MB, a AMD Athlon XP 3000+ CPU w/ stock heatsink and fan, 512MB Corsair PC-2700, a Radeon 9600 Pro, and a Maxtor 80 and 40GB hard drives. I think those are the main heatmakers. I'm running a 350W PS in a mid-tower case. It's got 1 intake fan in the front, I don't know what size.

Now my question is, how do you guys get your computer down to like 97 degrees?! My motherboard dectection says that things are running at like 140 degrees. Way to hot to me. To help I put round ATA cables in, but that didn't do a lot. Any suggestions to cool things down?

Thanks