Arduino Ethernet bootloader update

Does anyone know of any documentation relevant to updating the
bootloader on an Arduino Ethernet (not the Arduino/Ethernet Shield
combination)? The CPU is surface mount, and I'm not sure how to
get at it to program it.

Thanks - Will

You use the ICSP pins.

Many thanks - there seems to be a way of using these pins from another
Arduino, so I'll keep digging.

Will

A quick google search would have pulled up what you need or even looking at the arduino site tutorials.