Firstly, go to the OpenOffice website: http://download.openoffice.org/ and download the Linux .deb file to your desktop

Once you have done that, right click on the file and select Extract

Then you'll see a file called OOO320_m18_native_packed-1_en-GB.9502

Remove the existing version of OpenOffice with this command:

sudo apt-get remove openoffice*.*


Then paste this command:

sudo dpkg -i ~/Desktop/OOO320_m18_native_packed-1_en-GB.9502/DEBS/*.deb


Then paste this command:

sudo dpkg -i ~/Desktop/OOO320_m18_native_packed-1_en-GB.9502/DEBS/desktop-integration/openoffice.org3.2-debian-menus_3.2-9502_all.deb


Once you've done that you'll find OpenOffice 3.2.1 in Office.