How Can I Switch to System-V ?

["Thomas H. George,,," <georgeacct@spininternet.com>]

I have two computers.  At some time in the past I found an instruction 
which replaced all the individual rc?.d files with a single 
runlevel.conf file in /etc with references to the startup files in 
/etc/init.d.

I have lost/forgotten how to do this.  I would like to convert my second 
computer to this startup method as it allows easy control of the startup 
sequences.