Well, the easiest way to get rid of the noise problem is to get rid of the CAK 38. It's a bit long in the tooth as far as heatsinks go, and there are alot of sinks out there that cool better with much less noise.
The Taisol sinks, for instance. The Taisol CGK7600092 is the newest one, certified to cool up to XP 2000+ chips, and the fan only puts out 32db. You can get them for about 30 bucks here http://www.inflowdirect.com