update-alternative setup for libreoffice

Debian Wheezy has the libreoffice 3.5.4 as the default office suite, somehow, I don't like to use 3. For better handling stupid MS file formats, I installed LibreOffice4 from its website via downloading deb packages :

jhlee@kaffee:/volatile/firefox_download$ tar zvxf LibreOffice_4.1.5_Linux_x86-64_deb.tar.gz
jhlee@kaffee:/volatile/firefox_download$ cd LibreOffice_4.1.5.3_Linux_x86-64_deb/
jhlee@kaffee:/volatile/firefox_download/LibreOffice_4.1.5.3_Linux_x86-64_deb$ ls
DEBS/  readmes/
jhlee@kaffee:/volatile/firefox_download/LibreOffice_4.1.5.3_Linux_x86-64_deb$ cd DEBS/
jhlee@kaffee:/volatile/firefox_download/LibreOffice_4.1.5.3_Linux_x86-64_deb/DEBS$ su
Password:
root@kaffee:/volatile/firefox_download/LibreOffice_4.1.5.3_Linux_x86-64_deb/DEBS# dpkg -i *.deb

But, still the default executable links are libreoffice3, find the executable links via whereis {libreoffice, soffice}

jhlee@kaffee:~$ whereis {soffice,libreoffice}
soffice: /usr/bin/soffice /usr/bin/X11/soffice
libreoffice: /usr/bin/libreoffice4.1 /usr/bin/libreoffice4.1-printeradmin /etc/libreoffice /usr/lib/libreoffice /usr/bin/X11/libreoffice4.1 /usr/bin/X11/libreoffice4.1-printeradmin /usr/share/libreoffice /usr/share/man/man1/libreoffice.1.gz

Then, select all real executable links for both libreoffice versions as follows:

root@kaffee:/usr/share# ls -ltar /usr/bin/libreoffice*
lrwxrwxrwx 1 root root 34 May 30  2013 /usr/bin/libreoffice -> ../lib/libreoffice/program/soffice
lrwxrwxrwx 1 root root 35 Feb  6 07:06 /usr/bin/libreoffice4.1 -> /opt/libreoffice4.1/program/soffice

root@kaffee:/usr/share# ls -ltar /usr/bin/X11/libreoffice*
lrwxrwxrwx 1 root root 34 May 30  2013 /usr/bin/X11/libreoffice -> ../lib/libreoffice/program/soffice
lrwxrwxrwx 1 root root 35 Feb  6 07:06 /usr/bin/X11/libreoffice4.1 -> /opt/libreoffice4.1/program/soffice

root@kaffee:/home/jhlee# ls -ltar /usr/bin/soffice /usr/bin/X11/soffice
lrwxrwxrwx 1 root root 34 May 30  2013 /usr/bin/X11/soffice -> ../lib/libreoffice/program/soffice
lrwxrwxrwx 1 root root 34 May 30  2013 /usr/bin/soffice -> ../lib/libreoffice/program/soffice

[Update] Remove 4.1, and install 4.3,

Make a symbolic link in /opt in order to reduce the further work for next upgrade.

lrwxrwxrwx  1 root root   14 Nov 24 08:28 libreoffice -> libreoffice4.3

and  did the following commands,

root@kaffee:/usr/share# update-alternatives --install /usr/bin/libreoffice libreoffice /usr/lib/libreoffice/program/soffice  1
root@kaffee:/usr/share# update-alternatives --install /usr/bin/libreoffice libreoffice /opt/libreoffice/program/soffice  1
root@kaffee:/usr/share# update-alternatives --install /usr/bin/soffice libreoffice /opt/libreoffice/program/soffice 1
root@kaffee:/usr/share# update-alternatives --install /usr/bin/X11/soffice libreoffice /opt/libreoffice/program/soffice 1

Still don't understand what the last numbe 1 means (man page tells its prority). I naively assume it doesn't matter for my enviroment.

root@kaffee:/opt# update-alternatives --config libreoffice
There are 2 choices for the alternative libreoffice (providing /usr/bin/X11/soffice).

  Selection    Path                                  Priority   Status
------------------------------------------------------------
* 0            /opt/libreoffice/program/soffice       1         auto mode
  1            /opt/libreoffice/program/soffice       1         manual mode
  2            /usr/lib/libreoffice/program/soffice   1         manual mode

Press enter to keep the current choice[*], or type selection number:

So, soffice or libreoffice could execute libreoffice4 instead of 3.