I'm not sure what use it is to write this here, but maybe someone finds the solution to this problem? At least this is a kind of archive for me to remind me of what I found so far to solve the problem.
Which problem is he talking about anyway? If I want to convert a tex-document to an odt-document using oolatex.exe (BTW: I'm working on Win XP), I very often don't get any odt file at all because the process stops for different reasons. And even when I got an odt-document once, OpenOffice could not read it.

One Problem in this whole chaos was that towards the end of the converting process a program called zip.exe is called (if I get it right, an odt-file is a zip-archive made up of several folders (e.g. a pictures-folder) and some xml-files). But I had no zip.exe on my system. I downloaded info-zip and just put it in the windows-folder, cause I knew it would be found there and that solved the problem. But as I said, there are some more and here are some ressources related to it. Maybe you can make sense of them (unfortunately I have no time to go through them more thoroughly myself):
http://www.mail-archive.com/lyx-devel@lists.lyx.org/msg123680.html
http://ubuntuforums.org/showthread.php?t=453721
http://ubuntuforums.org/showthread.php?p=3153341
... and lots more to find if you google for oolatex...

P.S. What I don't understand is: how does mk4ht work on windows? It's a perl-script so am I supposed to install perl on windows or what?