tar xvfz LO_3.3.0-beta1_Linux_x86_install-deb_en-US.tar.gz
cd en-US/DEBS/desktop-integration
dpkg -i libreoffice3.3-debian-menus_3.3-9526_all.deb

You can check my repository by adding the following line into your /etc/apt/sources.list

sudo gedit /etc/apt/sources.list

deb [URL]http://download.tuxfamily.org/gericom/lucid[/URL] / #gericom@hummer

deb [URL]http://download.tuxfamily.org/gericom/maverick[/URL] / #gericom@hummer

To check the authenticity of the package, you need to import this key [URL]http://download.tuxfamily.org/gericom/gericom.asc[/URL] into your trusted software providers list.

It can be done easily with the following two commands:

1. Adding the repository:

sudo add-apt-repository "deb [URL]http://download.tuxfamily.org/gericom/lucid[/URL] / #gericom@hummer"

2. Adding the signing key:

wget deb [URL]http://download.tuxfamily.org/gericom/gericom.asc[/URL] -q -O- | sudo apt-key add -

And finaly:
sudo apt-get update