Here are a collection of web resources about  MS nightmare licensing stuff – enjoy! and good luck:

 

MS Licensing documents: http://www.microsoft.com/licensing/about-licensing/volume-licensing-briefs.aspx#tab=1

MS Licensing FAQ: http://www.microsoft.com/windowsserver2008/en/us/licensing-faq.aspx

MS RDS licensing: http://www.microsoft.com/windowsserver2008/en/us/licensing-rds.aspx