Actually in Windows 2008 it has changed a bit.
As per Technet
In Windows Server 2008, you can create multiple DTCs in a failover cluster using the following steps:
1. Create multiple cluster groups in the failover cluster.
2. Create a clustered MS DTC resource for each group.
Here is the full link for it
http://technet.microsoft.com/en-us/library/cc730992%28WS.10%29.aspx