For people who are wondering if SEPM could be installed on Windows Server 2008 R2 and who had tried installing MR4 and was not all that success, there is a good news for you. MR4MP2 installs flawlessly!!
However, on my tests, the server frequently freezes. And I hope this will be fixed through some update soon.
I would love to hear from people who have installed SEPM on Windows Server R2 Beta.