Yes, they can coexist. Install SQL Server 2005 as a named instance, not default. The great thing is that SQL Management Studio can be used on SQL Server 2000 too.

>Hi,
>
>I have sql server 2000 Enterprise Edition installed on my development computer. I'd like to install sql server 2005 Developer Edition on the same computer, and be able to use them both, rather than upgrade the old to the new. Is this do-able, or does 2005 require previous versions to be uninstalled first?
>
>Also, I will be installing Visual Studio 2005 Professional Edition. Do you know of any gotcha's with using this with both versions of sql server?
>
>Thanks.