Many thanks for all the wonderful responses, particularly : Tom Blinn, 
Whitney Latta, Larry Schafer and John Hergert.
The conclusion is that any script will be killed when shutting down to 
single user mode !
BUT it is possible to backup the the system in single user mode using 
cron. The basic principle is to create a file e.g. /tmp/dump then either 
edit /sbin/bcheckrc or create a script in /sbin/rc2.d that checks for 
the existence of this temporary file, performs the backup and then 
deletes the temporary file.
Once Again  Thanks
>Kevin Jones
>
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Received on Tue Jun 09 1998 - 10:49:15 NZST