Detailed and updated operations are now on our dev's blog:

http://blog.doudoulinux.org/post/2011/04/09/Clean-install-of-DoudouLinux-on-hard-disk

This works! On a real computer I had a fresh and clean DDL install on HD. It is now booting in 40s instead of 120s from CD. I installed the system with 3 partitions: root, home and swap. The root system needs 1.9 GB so you have to setup at least a 2.5 GB root partition. Of course if you want to add software or don't want a separated home partition (bad idea), make it larger!

Finally please note that there are few details to be corrected:

• at boot GRUB is complaining about a missing splash image

• network may not work because the file “/etc/network/interfaces” is appended with another network conf at each boot (which causes inconsistencies).

• boot is hanging tens of seconds when network is not connected because of the persistent conf in “/etc/network/interfaces” (DHCP)

The first point can be solved by editing “/boot/grub/menu.lst” and adding “boot” between the double slash (//) in the line speaking of splash. Note that the Remastersys splash image is not childish at all. Prefer installing the package “grub-splasimages-doudoulinux” instead! (and replace the file in “/boot/grub/splash.xpm.gz”)

The second one can be solved by removing the for loop of the 3rd block of code in “/etc/rc.local”.

The last one cannot be simply solved. You need to remove the file “/etc/network/interfaces” at each boot and restore “/etc/rc.local” in fact! Maybe by adding a small cleaning service run in early boot (there may already be a cleaning service at boot that can be slightly modified). Or maybe just change “auto” into “allow-hotplug” in “/etc/network/interfaces”.

Richard proposed to look at Remastersys:

http://geekconnection.org/remastersys/

They have packaged a shell script to install a Live system on disk. The package is providing the command “remastersys-installer” which is said to install the Live system.

To test it, we need to type several code lines as root:

=========================================

SOURCESLIST=/etc/apt/sources.list
DANSREGEXPEXCEPT=/etc/dansguardian/lists/exceptionregexpurllist
DANSSERVICE=/etc/init.d/dansguardian

# register remastersys repository
echo 'deb http://www.geekconnection.org/remastersys/repository debian/' >> $SOURCESLIST

# fix bug DansGuardian blocking deb's files
# see: https://gna.org/bugs/index.php?18003
echo '\.deb$' >> $DANSREGEXPEXCEPT
$DANSSERVICE reload

# install remastersys
apt-get update
apt-get install --assume-yes remastersys

# call installer
remastersys-installer gui

=========================================

The script is first installing missing packages, then asking questions, proposing to repartition the disk, and finally installing the Live system.

Note that tests in VirtualBox did not succeed but I'm not sure that my disk was large enough (2 GB only) and I'm half confident with VirtualBox for this kind of operation. Please report tests on a real machine if you have the opportunity to do this.