License Keys

Morning Folks.

Have a question regarding the Windows 2000 Server Key. We purchased the appropriate licensing from a 3rd party, non-profit software distributor. We received 2 licenses for Windows Server 2003 (for some reason) and we installed fromour 2000 server cd, attempting to use both of the keys. When this did not work we were forced to use an existing key that also exists on a current production server (this was also purchased with the appropriate licensing). We have since received thecorrect key from Microsoft and are attempting to input the correct keys. Is there a way to do this? If so, please provide specifics on the process. Also, are there any issues with using duplicate keys on multiple installations in a network environment?

Thanks for any info.

Dennis Jones