R2 Version Confusion

MS Poster · Guest

Hello:

I have Open License versions of both Server 2003 Standard and Enterprise.
I also have my OL key for R2 Enterprise. If I run the R2 installer from a
network share (that is, I execute Setup2.exe) to an W2k3 Ent SP1 machine,
it installs fine. If I run it against W2k3 Standard SP1 machine, it fails
with "Setup cannot continue because the operating system edition is different
from the Setup edition."

Do I need a different version of R2 for Standard? Or do I just need a different
license key? I have Software Assurance. Should this be covered by SA?

Thanks.