OSXGNU.org Package Background image(background.tiff):
Usage: place file in the Resource directory when building the package or after building.

Postflight script for creating auto start controled by hostconfig file:Download here

#!/usr/bin/perl
#This script adds SystemStartup functionality for OS X
#CASE COUNTS!!!!!!!
# Script by Chris Roberts <chris@osxgnu.org>
#No warranty of any kind and all liability is expressly denied
# use at your own risk
#this script is FREE TO All to use/modify as long as this notice remains.
 
#$Id: postflight,v 1.1 2003/06/01 18:05:43 chris Exp $

#where is the hostconfig script
$SCRIPT='/etc/hostconfig';

#-----inforamtion on the new service----------
#specify NEW SERVICE NAME HERE
$NEWSERVICE='myservicename';

#Specify the default State of the new Service YES = on NO =OFF
$NEWSERVICESTATE="YES";

#-------Information on OLD services to work with------ 
#specify a service to disable/remove (OPTIONAL)
$OLDSERVICE='';

#OLD service state NO = OFF YES = ON REMOVE = delete from hostconfig
$OLDSERVICESTATE='';

#-------Now we do our work no configuration below this line -------

#open the SCRIPT and read it into memory
open(INPUT, "$SCRIPT")||print "cant open for read";
@FILE=<INPUT>;
close (INPUT);

#now iterate over the file and find old service if defined
#and do the changes requested
if($OLDSERVICE){
	foreach $LINE (@FILE){
		if($LINE=~ /$OLDSERVICE/){
			if($OLDSERVICESTATE eq "NO"){
				$LINE=~ s/YES/NO/;
			}
			if($OLDSERVICESTATE eq "YES"){
				$LINE=~ s/NO/YES/;
			}
			if($OLDSERVICESTATE eq "REMOVE"){
				$LINE="";
			}
		}
	}
}
#now iterate over the file and find if the new service is already defined
#replace or insert as needed
foreach $LINE (@FILE){
	#a replace was required
	if($LINE=~ /$NEWSERVICE/){
		$LINE="$NEWSERVICE=-$NEWSERVICESTATE-\n";
		$EXISTS=1;
	}
}
#open the file for write
open(OUTPUT, ">$SCRIPT")||print "cant open $SCRIPT for write";
foreach $LINE (@FILE){
	print OUTPUT $LINE;
}
#an insert was required
if($EXISTS ne "1"){
	print OUTPUT "$NEWSERVICE=-$NEWSERVICESTATE-\n";
}
close (OUTPUT);

#aditional preflight commands follow--------

#examples
#system('/usr/sbin/chown -R nobody.nobody /usr/local/squid/var');
#system('/usr/local/squid/sbin/squid -z');

exit(0)

Usage: The file must be named postflight and must be chmod a+rx then,
place file in the Resource directory when building the package or after building.