Libreoffce and Slackware

IMHO and for some extrange reason, using the SOP doesn't work when trying to install LibreOffice in slackware from RPM. This is what I do

tar xf libreoffce<version>.rpm.tar.gz
cd libreoffice<version>
cd RPMS
rpm2targz *.rpm
cd desktop-integration
rpm2targz *.rpm

tar xf libreoffice-freedesktop.tar.gz

jed -n test

write this:

for i in *.tar.gz
do
echo -n "$i: "
echo
tar xf $i
done

exit jed and do sh test
it will decompress and create an opt dir in the current directory
then move the content as root to /opt
and move the created usr content to /usr