I have Vista Home premium and solved this problem by uninstalling openOffice, then uninstalling overdrive media, then reinstalling open office (installed, but did not open), shutting down, then reinstalling overdrive media, at this point I checked the associated file type and vista had odm associated with overdrive, not openoffice, i did not have to make the change. I did this all at once. This was my last try, however it seems to be working. Its odd this worked because the original install order was the same, just not all at once. I had already tried 'associating file type' .odm with overdrive media, and I was still not able to download, but this seems to work.
OOo 3.0.X on MS Windows Vista