AD DS activation on Windows 8 and Office 2013

My present MAK activation config is

• Windows 2008 domain controller (keep on using MAK for the server role)
• Windows 8  x 50pcs
• Office 2013 x 90pcs

I wish to switch to AD DS activation for easy maintenance.

Question 1

is Windows 2008 fit for the host?  it seems it has to upgrade to AD 2012 schemahttp://support.microsoft.com/kb/2757817?wa=wsignin1.0  The 2008 server version is not R2.

Question 2

How can i save both KMS (Win8 and Office 2013) at the host?

Question 3

What is "specific volume license key (CSVLK)"?

Question 4

How to switch the existing MAK clients to AD DS?

Thanks a lot.