We've got a server with TFS2008 that we do all our builds on. I need to get an install of TFS2010 running. Can I run it on the same server (windows 2003) or do I need it on a seperate one?
This is not possible.
The exact question was asked before in the MSDN Forum and you can read all the answers here.
As Arun said TFS 2010 installer checks if previous version of TFS is installed on the computer and will not let you install TFS 2010 if previous version is detected.
There are many reasons why it is not possible to install TFS 2008 and TFS 2010 side by side. One of them is the fact that both are creating an IIS web site with the same name - "Team Foundation Server".
Regards,
--Vladimir