Install Open Office in place of LibreOffice in Fedora 15

You can remove libreoffice and install Open Office, following steps given below:
Download latest OpenOffice from the Sun Microsystems web site.

Remove LibreOffice by:
# yum erase LibreOffice-core <enter>
# yum erase LibreOffice-ure <enter>

Install Open Office after that.
You will get an installation failure as the LibreOffice if you do not remove the Libreoffice-ure file.

Even after that, for every update you apply from the Fedora repositories, you will need to give:
# yum update –skip-broken <enter>

else, any updates will give an error on LibreOffice-ure being obsoleted.