here is a script that help to burn plenty of data you want to keep all together in respective directories ~like MP3 :-)
basicly it just arrange size of directories to best fit on a CD, trying to fill left space on CDs with smaller directories I've saved 8 CDs over 72 using this tip 
#!/usr/bin/perl
use strict;
use warnings;

my ($k,$nom);
my $maxsize = 690_000;
my $makeiso = 0;
my $pattern = "*";
my @CD = ([0,[]]);
my $i;
my $inserted = 0;
use Data::Dumper;

for (@ARGV) {
    $maxsize = $1 if /-ma*x*s*i*z*e*=(\d+)/;
    $makeiso = 1  if /-mkisofs/;
    $pattern = $1  if /-pattern=(.*)/;
    die "usage $0 -max=xxx (maxsize in K)
              -mkisofs 
              -pattern='*.gz' 
              -help" if (/-he*l*p*/) ;
}

my $pid = open(SOURCE, "du -sk $pattern|sort -nr|") or die "Couldn't g
+et SOURC
while (<SOURCE>) {
        chop;
        ($k ,$nom ) = split /\t/,$_,2;
        $inserted = 0;
        if ($k > $maxsize) {
                print '"' . $nom . '"' . " out of Range $k\n";
                next;
        }
        foreach $i ( 0 .. $#CD ) {
                my $rcontent = \@{$CD[$i]} ;
                if ($rcontent->[0] <= ($maxsize - $k)) {
                        $rcontent->[0] = $rcontent->[0] + $k;
                        push @{$rcontent->[1]},$nom;
                        $inserted = 1;
                }
                last if $inserted;
        } 
        if (! $inserted) { push @CD,[$k,[$nom]] };
}
close(SOURCE) or die "Couldn't close: $!\n";
if ($makeiso) {
      foreach $i ( 0 .. $#CD ) {
              my $rcontent = \@{$CD[$i]} ;
              print "mkisofs -o cd$i.iso " . join " ", map {qq/'$_'/} 
+@{$rcontent->[1]};
              print "\n";
      }
} else {
       $Data::Dumper::Varname="CD";
       print Data::Dumper::Dumper(@CD);
}

[download]
it's up to you to grep the output for setting your burn process.
on the advice of b10m I've make a mkisofs output
hope you find it usefull

In reply to quick CD burner Selector/Optimiser by dominix

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