Upgrade windows 2003 server standard to SERVER 2008 standard?

I would like to upgrade two windows server 2003 standard edition to windows server 2008 standard edition on 32 bit.  What do I buy in order to do this?  An OEM product? Or a regular copy of windows sever 2008?  The original software was OEM.  If I purchase Windows server 2008 standard edition (OEM), will I be able to upgrade my existing OS with this type of software?
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Lee W, MVPTechnology and Business Process AdvisorCommented:
You cannot upgrade using OEM software.  OEM licenses are for CLEAN installs only (By Original Equipment Manufacturers).  You need EITHER an upgrade disk, a retail disk, or a volume license disk.  Finding a copy of 2008 from a trustworthy source these days might be difficult.  If you purchase Server 2012 R2, you should get downgrade rights to 2008 R2... and POSSIBLY earlier... and the media for it would be on the Volume License Service Center (VLSC).  (I just checked and it APPEARS I still have access to 2008 (non-R2 in my VLSC Portal).

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Server Software

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.