Windows Server 2008 and Windows Server 2008 R2 utilize the Server Manager for adding components. If you want to install Certification Authority, Certificate Templates, and Enterprise PKI snap-ins on a non-Certification Authority (CA), then you have to use the Add Features Wizard in Server Manager (shown in the following figure).
The steps to get to the installation point shown above are as follows:
Richard Mueller edited Revision 3. Comment: Modified title, changed tag "Windows 2008" to "Windows Server 2008"
Ed Price - MSFT edited Original. Comment: Tags and title cap guidelines.