http://www.amibay.com/showthread.php?8500-2MB-A600-CHIP-RAM-Hack-Home
Here is the link to the thread on A600 chip ram upgrade.
My posts are on papge 11 of this thread with a link to pics of my mod:
https://www.flickr.com/photos/66577016@N00/9544994868/in/photostream/
Cheers!