Can I have both sql2005 server and sql epxress server installed and co-exist on my XP pc?

SQL 2005 SERVER was installed first on my XP.  I now install the sql express 2005 and I get a warning message about running come sqlupdate commond in DOS command line to change my sql 2005 version.  What does this mean?
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Guy Hengel [angelIII / a3]Billing EngineerCommented:
it means that your sql express setup tries to install using the existing instance name, and as that one is higher in version/edition, the setup refuses.

so, you have to modify the setup setting to install a named instance, ie a distinct name from the existing one.

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lapuccaAuthor Commented:
Thank you.
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Microsoft SQL Server 2005

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