I run Windows Home Server (WHS) but I do not install on it applications beyond the one that are need to control its functions.
There is No point installing application on WHS it is not a server like the regular Win2003 or Windows SBS.
Windows Home Server is a peer-to-peer server.
Instead of using regular Win Client OS, WHS has additional capacities that build specifically to help End-Users to keep files, connect in from the Internet when you are on a Dynamic ISP's connection, use it for backups, and few other features
It does not have a DC or any other similar control to act as the center for workstations in a server topology.