Hi Mike,
On the crm server install the Server-ENU.exe
If you are using the email router, on the server that the email router is installed on, install the Router-ENU.exe
If you have a separate srs server, then you will probably installed the srs connector and then install the SRS-enu.exe on that server.
The DMClient-ENU is for the data migration client, typicaly installed on a different server, if it is used.
Alex Fagundes -
www.PowerObjects.com