System :: adding printer w/lpadmin in a script

I tried adding printer w/lpadmin in the xinitrc before the slit items w/ sudo lpadmin -p "printer name" -P /etc/cups/ppd/printer.ppd -v lpr://ipaddress:9100 -L "location" -E & it is not there. Where is the apporpriate place to put this command so it will install automatically?

original here.