Got another stage further with the Apple Wireless Keyboard..
This post details a full installer that so far seems to do the whole job out of one single installer:
http://www.autohotkey.com/forum/topic34771.html
It takes you off to a Google Code site:
http://code.google.com/p/uawks/
Seems to work out of the box. The eject button doesn't work with this installer but does work with AutoHotKey and the script here: