Migrating Windows Internal Database to SQL Server

I manage a windows server and have been having performance issues that seem to stem from SQL Server. Maybe we can solve such problemswith an upgrade the of the database engine to a full installation of SQL Server 2005. This article might be useful.
http://technet2.microsoft.com/windowsserver/en/library/b4852133-5ed3-48d7-8a95-e7866e638c181033.mspx