MS SQL 2005 Will not install on Windows 2008 server and as a result you will get the following warning message.
SQL Server Edition Operating System Compatibility (Warning) Messages:
SQL Server Edition Operating System Compatibility Some components of this edition of SQL Server are not supported on this operating system. For details, see 'Hardware and Software Requirements for Installing SQL Server 2005' in Microsoft SQL Server Books Online.
More information: http://support.microsoft.com/kb/950636