I finally did it!! But LinuxMce doesn't start correctly...
After the 1st installation (terminated with #### Package pluto-orbiter failed) I tried one more time (without reinstalling Edgy).
I had to access ubuntu as root and make "apt-get remove --purge vim-common ; apt-get install vim
" and "sudo rm /usr/pluto/orbiter/floorplans".
Then I started the setup. It was all ok (don't know why) during the long installation, but at 1st linuxmce boot it freezes on a grey screen.