FSMO role Schemamaster on a x64 Domain Controller

The DC holding the FSMO role Schemamaster controlls all changes to the schema.
To make changes to the schema, you need access to the schemamaster.
There can only be ONE schemamaster.

Transfering the Schemamaster role:

Use MMC snap-in Active Directory Schema Master to transfer schemamaster role.
Before using the snap-in, the Schmmgmt.dll has to be registered:

Start -> Run
execute: %windir%\system32\regsrv32.exe schmmgmt.dll

Transfering the Schemamaster role:
Start -> Run, type mmc
Add/remove Snap-in
Add
Add Active Directory Schema

In the consoletree, right click on Active Directory Schema, and click Change Domain Controller.
Supply name for the domain controller that now shall hold the schemamaster role.
In the consoletree, right click on Active Directory Schema, and click Operations Master.
Click Change