The answer is yes. The default instance is greyed out when running update,
but running "install new instance" it works as I guess it should.

"David R" wrote:

> Here is my problem:
> 1. When setting up a server a few months ago, an installer apparently
> installs MSDE 2000.
> 2. He then installs SQL 2000 Enterprise, and since the default instance is
> taken, creates a new instance. The new instance is now being used to support
> a large system.
> 3. I recently notice that the default instance is MSDE, and since the
> default instance is also now being used, upgrade using the setup program.
> The upgrade appears successful until...
> 4. I remove MSDE 2000 from Add/Remove programs. Now the default instance
> cannot be accessed, and the services that this is based upon have
> disappeared. When I renenter Setup, the default instance is greyed out.
>
> Is it possible to re-install the default instance, while leaving the new
> instance intact?
>
> Thanks,
>
> David