Howard,
with LibreOffice3.4 already installed, just do the following, also to avoid a reinstall...
as user, open a terminal and copy/paste the following:
cd ~/.kde4/vdt/2/2a; /bin/rm -f LO*
/bin/cp -f /opt/libreoffice3.4/share/xdg/base.desktop LObase
/bin/cp -f /opt/libreoffice3.4/share/xdg/calc.desktop LOcalc
/bin/cp -f /opt/libreoffice3.4/share/xdg/draw.desktop LOdraw
/bin/cp -f /opt/libreoffice3.4/share/xdg/impress.desktop LOimpress
/bin/cp -f /opt/libreoffice3.4/share/xdg/math.desktop LOmath
/bin/cp -f /opt/libreoffice3.4/share/xdg/printeradmin.desktop LOprinteradmin
/bin/cp -f /opt/libreoffice3.4/share/xdg/writer.desktop LOwriter
chmod 744 LO*
then you can run LO from vdt2 Office
-p.