When rolling scripts for rc.d you can specify a command that is executed when /etc/rc.d/script start is executed.
I presume that a kill -QUIT is used when a /etc/rc.d/script stop is executed?  

Anyway to get to the point I have a number of services that use separate scripts for starting up, shutting down and
restarting e.g. startup.sh & shutdown.sh how can I modify my custom /etc/rc.d/scriptxyz to execute the appropriate
script for start, stop, restart etc..?

Thanks