Need some help in changing the frequency of PWM

http://usethearduino.blogspot.com/ I know the frequency is related to the clock cycle now. But I am using the arduino duemilanove with ATmega328, what is the code? Something simple I can find in website http://www.arduino.cc/playground/Code/PwmFrequency Is it work?

Please help me as soon as possible, my project seem to be running out of time

There's a specific question in there somewhere, struggling to get out.

The problem is, I cannot understand what the code is after I read it

The problem is, I don't understand your question is after I read it.

Saying "I don't understand" something is meaningless - I don't understand Finnish, but unless I need to know something specific in that language, it doesn't bother me that much.

What is "the code" that you don't understand?