ISC 2.0.2 NFS & system shutdown

[Alan M. Carroll]

I'm running ISC 2.0.2, with NFS, where most users have their home directories 
on the NFS partition. The problem is when I want to shut the system down. Since
the NFS goes down first, it tries to umount the NFS partitions before the user
processes have been killed, which not only takes forever as it waits for time
outs, but doesn't take the system down cleanly either, often leaving /usr and
other paritions dirty. The only thing that seems to work is to make sure
everyone is off, logon as root at the console, and then shutdown. Is there any
way to do a better job of this?