I'm about to overclock my x2 4200+ Windsor. But I have no experience at all. The cooler is standard (stock).
Okay here are my system specifications:
Motherboard: Asus M2N SLI Deluxe
VGA: Asus EN7600GT/2DHT 256mb PCIE
RAM: Kingston 1024mb PC667 Dual Ch.
HD: Maxtor 200gb 8mb 7200rpm.
Power supply: CRS 400W.
The rest of the information you probably need you'll find in the image below:

Thanks for looking at this!