#proposed patch to packimages.pl this my first time doing anything like this so be gentle. Will push to mailing list after testing. 
sub check_images
{
    my $global_hash_ref = shift;
    my $custom_hash_ref = shift;
print_message("assemble image list ...") if $verbose;
    foreach (keys %{$custom_hash_ref} ) {
	#check if in 'global' and in 'custom' list
	if (exists %->{$global_hash_ref->} ) {
	next;
	} else {
	die "\nImage file not present in global.\n\n";
     }
}
close ($fh);
