Windows licensing of a virtual copy of 2003 server standard edition

I have a licensed instance of 2003 server standard edition on a physical server. can i also then run a third party virtual instance of the same server on the physical machine... i.e a vmware server with a cloned copy of the server for testing.

or do i need another license for the virtual copy as well?

From serverfault Marko

• STANDARD LICENSING DISCLAIMER:

  While SF can give you a decent idea, and more often than not a very good answer, the best place to ask these types of questions is to ask you licensing representative from Microsoft.

  With server 2003 you could have the following virtual servers per license:

  Standard: 1 VM OR 1 Physical
  Enterprise: 4 VM OR 1 Physical
  Datacenter: Unlimited VM OR 1 Physical

  I'm pretty sure they changed this for 08, but i can't find the 2003 page anymore it all redirects to 2008 R2 so this is purely from memory.

  Greg Askew : That is also what I recall. The document below has the information for the 2003 time period. Interestingly, it still has the markup info. http://www.google.com/url?sa=t&source=web&cd=1&ved=0CBUQFjAA&url=http%3A%2F%2Fdownload.microsoft.com%2Fdocuments%2Fuk%2Flicensing%2Ffaq%2Fdownloads%2Fvirtual-machine-environment.doc&ei=hYsGTL6pJoGKlwfmwvTaCg&usg=AFQjCNG4PnsDjFIDvAzeShHvJc1RPGIzAw&sig2=LAjeyZveQu2m7u_5L45U0Q

  Chris S : +1, correct info; 2008 (& 2008 R2) is different.

  Helvick : The change for 2008 (and 2008 R2) simply take into account the fact that they allow the physical host to be licensed to run as a Hyper-V role in addition to licensing a VM instance or instances. The OS instance on the physical host can only be used to run Hyper-V though.
  From Zypher