well I had to follow what the other post said because nothing was working.
Basically I typed
xadunfile AmigaOS-Update "" PASSWORD=####### (I edited out the password just in case there is something wrong with posting it.)
And it worked in that it unpacked everything into the same directory but it still won't install with the installer. It still says its missing the xad password and aborts.
I know this boingbag1 works for alot of people, yourself included. In fact I watched it work on your video. I'm not sure what I've done different.