I know nothing about OS X, and it's blatantly obvious when I read something like this:

This article explains how to set up a Mac OS X client machine to authenticate against an Active Directory Server without implementing any schema extensions to the AD server. Note that the management capabilities with only basic authentication implemented are limited.

[ Mike's Mac OS X Management Software and Tips ]

Step One: Open the Directory Access application located in the Utilities folder.

Open the what? In the where? Can't find either of these, nor can my "Finder".

I used to know how to do this sort of thing, then OS 9 came out, oh wait X. I guess I'm a bit behind...

Update: this page did it. Eventually I read this close enough, and soaked up some "Applespeak" and got the integration working. I must say this was much easier than trying to get OS8 to use a Novell 3.12 server...