From what I believe, the latest ISO released contains the OS4 Final + July 2007 files overlayed with the bare Moana fileset.
So far we've tried the OS4 final ATI chip driver, the Moana ATI chip driver and Moana Safe ATI chip driver.
Somebody posted here a few months ago that they have a 32MB Radeon card in their Mac Mini, and received the black screen, but once they merged the files, they managed to get the screen working.