Hope this resolves the issue.. psswitcherd is supposed to be in /etc/event.d dir after the installation of the app. As it says the problem's in cp: /tmp/psswitcherd, can you plz do the following: cp /etc/event.d/psswitcherd /tmp/ and then try reinstalling. If it still fails then you can go here and download the .deb file manually to your device then install this file. sudo dpkg -i /path/to/file/psswitcher*
Nokia-N900:~# find / -iname '*psswitcher*' /opt/usr/share/icons/hicolor/48x48/apps/PSSwitcher.png /var/lib/dpkg/info/psswitcher.md5sums /var/lib/dpkg/info/psswitcher.prerm /var/lib/dpkg/info/psswitcher.postinst /var/lib/dpkg/info/psswitcher.postrm /var/lib/dpkg/info/psswitcher.list /var/lib/dpkg/info/psswitcher.preinst /usr/lib/hildon-control-panel/PSSwitcherplugin.so /usr/sbin/PSSwitcher /usr/share/applications/hildon-control-panel/PSSwitcherplugin.desktop /home/opt/usr/share/icons/hicolor/48x48/apps/PSSwitcher.png Nokia-N900:~#