1> download PSM xpi
2> use "unzip" to extract xpi into files
3> copy resulting "psm" directory to /usr/lib/mozilla
4> copy psm-helper/* to a temp directory
5> run make
6> copy resulting library to /usr/lib/mozilla/psm
7> copy /usr/share/doc/mozilla/psm-helper/start-psm to 
        /usr/lib/mozilla/psm/start-psm
8> make sure any user can read all these files, and execute psm and start-psm
9> run /var/lib/dpkg/info/mozilla.postinst

You now have a global PSM install

