SCE 2007 Fault Finding: Failure to Install with ISA 2004 Installed

When I tried to install System Center Essentials 2007 on SBS 2003 R2 Premium Edition, I received an installation failure. Viewing the Setup log file revealed errors setting up reporting services.
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Machine : SMEMANAGED01
Product : Reporting Services
Error : The setup has encountered an unexpected error while Setting reporting service and share point exclusion path. The error is: Fatal error during installation.
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Machine : SMEMANAGED01
Product : Reporting Services
Error : The setup has encountered an unexpected error while Setting reporting service and share point exclusion path. The error is: Fatal error during installation.
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Machine : SMEMANAGED01
Product : Microsoft SQL Server 2005 Reporting Services
Product Version : 9.1.2047.00
Install : Failed
Log File : C:\Program Files\Microsoft SQL Server\90\Setup Bootstrap\LOG\Files\SQLSetup0001_SMEMANAGED01_RS.log
Last Action : InstallFinalize
Error String : The setup has encountered an unexpected error while Setting reporting service and share point exclusion path. The error is: Fatal error during installation.
Error Number : 29528
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This issue is caused by the Configure Email and Internet Connection Wizard setting the Default Web Site to the Local IP Address instead of the default All Unassigned. The fix is of course to reconfigure the Default Web temporarily to allow the installation to complete, this is described in a knowledge base article http://support.microsoft.com/?kbid=920803.
I have prepared a quick Visual Guide because some folk just like to see.
| Open IIS Manager;
Select Default Web Site;
Right click Properties |
| Select IP Address;
Choose (All Unassigned);
Click Apply;
Click OK
Close IIS Manger |
When SCE 2007 is successfully installed return the configuration to the internal IP address.