I finally had the time to complete a new version of my MOSS2007 Installation Guide and have just uploaded it. This new version includes installing Service Pack 1 for the .NET 2.0 and 3.0 Frameworks and MOSS2007. I also added the SQL Server 2005 SP2 Cumulative Update Pack and an IIS fix, which solves an issue which caused the error message "Attempted to read or write protected memory" in the event log.
The new version can be downloaded here: HOWTO - Install MOSS2007 v2.0
And again: if you have any comments or additions, please let me know!