Assuming you have OOo 1.1.4. If not, you need to get that first.
First, you go to
http://download.openoffice.org/1.1.4/security_patch.html
There you note which file you need based on what operating system you have:
* Windows: *|sot645mi.dll|*
* Linux: *|libsot645li.so|*
* Mac OS X (X11): *|libsot645mxp.dylib |*
* Solaris x86: *|libsot645si.so|*
* Solaris Sparc: *|libsot645ss.so|*
Then, scroll down the page to select a download site. I chose:
U.S.A. FTP pair
<ftp://openoffice.mirrors.pair.com/contrib/rc/1.1.4secpatch/> ***
and double clicked on "pair" to get there.
Once there, you'll see a Linux style directory listing of all of the
patches.
For Windows, move your mouse to the line that looks like:
-r-- 1 192512 Apr 12 11:05 sot645mi.dll
<http://bulkdownloads.digitaldistribution.com/contrib/rc/1.1.4secpatch/sot6
45mi.dll>
and click on the sot645mi.dll.
That should bring up the download manager in your browser. When it asks
you what to do, save the patch to a file (and be sure to remember where
you saved it!).
I usually create a Download directory on my disk and create a separate
subdirectory for each application such as d:\Downloads\OpenOffice.org
That way, if I need to reinstall something, etc. later I can easily find
it again.
Once the file is downloaded, go to the directory where OOo is installed
and rename the old file of the same name to something like
sot645mi.dll.old
<http://bulkdownloads.digitaldistribution.com/contrib/rc/1.1.4secpatch/sot6
45mi.dll>
Then copy the file you just downloaded to this directory.
This can all be done in Windows Explorer or in a MSDOS prompt window.
I've been using PowerDesk instead of Windows Explorer for so long that I
don't remember the specifics.
Once that's done, you should just close OOo and restart it and you're done.