MP Installation in WIN 2003 Server as domain controller returns 1603 error

Dear,
WIN 2003 std Server configured as Forest as well as DOMAIN with DNS server. In the same I have installed SCCM 2007 site server with SQL 2005 server. SCCM SP1 is configured for MP, SLP, DP,FSP.  Now, I have the MP configuration issue.
the MPSetup.log :  "The mp.msi exited with return code: 1603", mp.msi cooul not be installed.
The mpMSI.log returns: Installation failed, MainEngineThread is returning 1603.
IIS is with WEBDAV, restarted.
Kindly suggest the MP installation procedure with the IIS config in  WIN 2003 as a DOMAIN Controller. The domain admin is configured as IIS authorised user to access the defa WEB site.
The ConfigMgr Status Message viewer gives error messsage ID: 1016, 4951 cyclickly.
 

Reading msi log files isn't always fun... but in the mpmsi.log file, depending upon where the actual msi error occurred, it will tell at exactly what script, component, or feature within the msi that failed.  Usually about 1/2 way, or a little more, in the log file.  Obviously all log files are different, so I can't tell you exactly where to look.  But it will be considerably above the very end of the log file; quite a bit above.

You can try doing a search for 'value 3' in the .msi log file.  The error is normally a few lines above the 'value 3' entry.  Value 3 indicates that that particular part of the install failed.