Existe uma versão de 32 bits do Open Office no mesmo diretório. Basta baixar o arquivo Apache_OpenOffice_4.0.1_Linux_x86_install -deb_pt-US.tar.gz , descompacte e instale.
Após a instalação, crie arquivos como este ~/.local/share/applications/openoffice-writer.desktop
para Writer, Calc, Draw, Impress e outros:
[Desktop Entry]
Version=1.0
Terminal=false
Icon=openoffice-writer
Type=Application
Categories=Office;WordProcessor;X-Red-Hat-Base;X-MandrivaLinux-Office-Wordprocessors;
Exec=openoffice --writer %U
Name=OpenOffice Writer
GenericName=Word Processor
Comment=Create and edit text and graphics in letters, reports, documents and Web pages by using Writer.
StartupNotify=true
X-GIO-NoFuse=true
Keywords=Text;Letter;Fax;Document;OpenDocument Text;Microsoft Word;Microsoft Works;Lotus WordPro;OpenOffice Writer;CV;odt;doc;docx;rtf;
InitialPreference=5
StartupWMClass=openoffice-writer
X-KDE-Protocols=file,http,smb,ftp,webdav