The DPM Error Code Catalog has been published for download, in Word format, with the errors listed in numerical order. And the reason that it wasn't available sooner is...we guessed wrong.
See, it was in our original content plan for DPM 2006. We even assembled and formatted it, as an appendix to the Operations Guide. But then the argument was raised as to why we were including all these errors, some of which might never be seen by anyone, particularly since we were not adding more information to the errors -- it's merely a consolidation of what you actually see in the product, an error and a suggested action.
The "nobody wants to see the whole list and it might make customers think the product is too complicated, too much can go wrong" argument won out. We removed references to the appendix, and filed the draft away.
I haven't counted up the number of times since the product was released that I emailed a copy of the catalog to someone. Suffice to say, we finally recognized that it's useful information and that some customers want it. So we pulled it out, dusted it off to make it pretty as a stand-alone document, and threw it on the download center for whoever wants it. Enjoy!