RIS images won't join domain, Why?!

On the site linked below is an interesting discussion about why RIS images don't join to the domain in full unattended mode when W2K3 SP1 is in the environment!

Link

I applied the advice by enabling the Network access: Named Pipes that can be accessed anonymously group policy on the Default Domain Controllers Policy and then ensuring the following entries were present:

COMNAP
COMNODE
SQL\QUERY
SPOOLSS
LLSRPC
EPMAPPER
LOCATOR
TrkWks
TrkSvr
Browser
Netlogon
LSArpc
samr