How do i burn i bootloder to Arduino UNO from Arduino Mega?

Hi!

I have heard that it's possible to burn a bootloader to a empty ATmega8/168/328 processor, who fits on a Arduino UNO, from Arduino Mega. But i can't find a manual how to do.
I know that i need to drag som cabels/wires from the Arduino Mega pins to the Arduino UNO. But i don't know any more.

Best regards
P

See here: