Open the MCC, software, remove software search for ´office´ and remove all openoffice pacakges.
To install, untar the openoffice tar, delete the desktop/distro integration packages you don´t want, add the folder as a local repo, in the MCC go to install software, open the repo, select every package and install. (for more info about installing software look in thewike, link at top of the page)