After a day full of hard work, we are finally able to provide the first installer of OOo4Kids on the XO. Everything is detailed here. Please be aware that it is still a "beta" version: it does not yet every details for an official XO activity and can be pretty unstable. It still works pretty well. The .xo archive weight 113~Mbs. To install it, download it and use the "sugar-install-bundle" command in the XO's terminal.
Thanks a lot to Eric Bachard who helped us a lot putting the new organization of the installation set in place.