Check the IBM web site. I think there's something
there about getting
the root password on a machine you have console access to (which is
why no AIX machine should be left physically unattended :-).
Well... Considering that on just about any system that you've got physical
access to you can get around the root/system/whatever password... :^) On
some systems even with access it's difficult, on others it's very easy!
Zane