NFS archiving does a decent job backing up the config as well as the data. However, retoring the data is painful. Restoring the config is very simple and works well. Lookup in the docs on the pnrestore command.
Restoring data, depending on the size and amount of data you want to restore, takes a tremendous amount of time, and really has minimal configurable options. But as it is designed, it functions.
There are a few options for the pnrestore...
the pnrestore -m (Restoring mode. Enter 1 (default) to restore config only, 2 to restore both config and events, or 5 to restore config from local image.) gives you the option to restore config only or data as well.
Here is a sample of the pnrestore command:
pnrestore -m 1 -p nfs_server_ip:/nfs_export/pnarchive -t 06/03/03:0