The _install files are enough...
Just get it from your closest mirror:
http://www.openoffice.org/dev_docs/source/1.1.0/
(one ver. for Win32, another one for Linux).
The Win32 installation is effortless- so applies for the Linux ones when you follow the common sense:
1. Uninstall your previous OOo versions, and delete by hand the local+global directories. If you have installed from .rpm then the procedure is pretty obvious. If you have used the OOo script installer enter first your local directory (as user) and run "./setup -deinstall" and then from you global OOo directory "./setup -n" (as root this time, of course).
2. Unpack the tarball and run the install script (as root). The OOo tip of using as default "./install --prefix=/opt" is highly recommendable.
3. Enter the /opt/Openoffice.org1.1.0 directory and run "./setup" (as user), choosing local installation.
4. Put in the folder /opt/Openoffice.org1.1.0/share/dict/ooo your preferred dictionary, hyphenation and thesaurous files and modify the dictionary.lst file accordingly (this part also applies for the Windows version).
5. Make a shortcut at your desktop for the local launch script: /home/{username}/OpenOffice.org1.1.0/./soffice
(actually it's just a symlink to the global script). After opening the program you should set your correct settings under tools/options/Language Settings/