Finally I obtained my Linpus Gnome desktop that I like much more than Xfce. I should thank all people posting in various forums and blogs to arrive to the result that I wanted..... First of all, I used the script to obtain the Xfce advanced desktop, then I removed some conflicts and dependencies , then I installed nautilus and gnome-desktop , and finally I removed the autologin . Now I have a gdm where to insert user and password and where i can choose beetween Gnome and Xfce.