SQL Server Express 2008 Install Side-by-side w/ SQL 2005 Express Fails

Question

When I try to install a new instance of SQL Server 2008 Express on a development machine with SQL 2005 Express already up and running, the install validation fails because t

Answer 1

I had to unistall the Workstation Components and SSMS Tools Pack (SSMS Tools Pack is an add-in for Microsoft SQL Server Management Studio (SSMS) including SSMS Express.) Installation of SQL 2008 is now proceeding as it should.