SQL Server，并排实例冲突

I´m deploying my database to a SQL Server 2008 R2 Express instance that my software also installs. Everything works fine, but on certain target machines there are other instances of SQL Server 2008, 2005, 2000...I know that, theoretically, SQL Server instances may coexist side-by-side. But I also know that there are several conflicts between them. Internet is full of them. I´m deploying my database to a SQL Server 2008