[UCLA-LUG] Running something at shutdown?

[Dimi Shahbaz]

Well, every time I want to reboot, and I have an SMB mount still mounted,
the machine hangs in the middle of the shutdown/umounting partitions 
sequence, and I have to press reset.  Where can I put a little scripty to
handle unmounting of SMB mounts before it hangs?  I know shutting down is
runlevel 6 (right?) but does that mean I can put a little scripty under
/etc/rc.d/rc6.d (mandrake)?  If so, when in the shutdown sequence will the
script be run (before everything else?)

Can the script be something other than a shell script (ie, perl)?

TIA
Dimi