Configuration Manager 2007 R2 Evaluation Download
Download the evaluation copy here:
http://www.microsoft.com/downloads/details.aspx?FamilyId=7376214F-CBA3-4E0D-81FE-AD52488BE3A3&displaylang=en
System Requirements:
System Center Configuration Manager 2007 SP1 Evaluation (you cannot install this version on a Volume License or MSDN installation).