SQL Server Management Tools installation problem and Windows Installer CleanUp Utility tool

Recently I had to install SQL Server 2005 with Management Tools, however setup complained about already installed Client Tools from SQL Server Express Edition. I tried to find the SQL Express Edition from Add/Remove Programs but it was not there! The Windows Installer CleanUp Utility (free tool!) came with help. After removing the Express Edition the SQL Server 2005 installed Management Tools without any problems.