Scott Forsyth has written a great article on using the built-in IISCnfg tool for IIS Metabase replication.
Microsoft provides a tool called IISCnfg for management of the Internet Information Services (IIS) Settings. One of the features that this includes is the ability to replicate the IIS settings from one server to another. This is useful in a webfarm environment where you require all web servers to be in sync.
Read the full article on IIS Settings Replication.