Automator


$ xterm -display :0 -e ssh -X andrey.zaharov@soe gnome-session &
$ VBoxManage startvm WindowsXP

Result: one desktop, "native" session KDE, Gnome over ssh, Windows Xp in VirtualBox in desktop integration mode.
KDE & Gnome & Windows XP: Of course, it is more convenient to work with "pocket" Windows Xp. So it is safer:) A gnome just standing on a remote server. How to do so, see the blog.

Of course, it is more convenient to work with "pocket" Windows Xp. It is safer :). Gnome is on remote server. How to do this, see the this blog post.