Ok, to put it simply, there is no installation guide for the 1.6 - DMS released the adaptor, but offer very little support for it. (http://www.dms3.com/xbit/files/chips/XBit_Diagrams(zip%20packed)/LPC_rebuild_1_6.rar,
http://www.dms3.com/...stall_cmix.rar)From reading through that 'lite' guide, I cant see what else you need to know to do the installation. The info is there - and it is a lot better than what is on the official website.
There is a little info that might help you in the pinned topics - (http://forums.xbox-scene.com/index.php?showtopic=337644).
Im guessing that if you want the full version of the manual, you would probably have to buy something from the website.