This is what happens when you try and do something 10 minutes before knock off and it doesn't work - hence the post. This morning I've tried some other things and what follows is my experience: Placed the following line in LocalSettings.php: $wgFileExtensions = array(...defaults...., 'kml', 'kmz'); Then I logged in and hit the "Upload File" link. This dropped me in the Special:Upload page. I hit the browse button and selected a *.kml file. I filled in the destination name and description, hit Upload and get a page with: This file contains HTML or script code that may be erroneously be interpreted by a web browser. in big red text across it - but no mention of it not uploading. I then entered the [[media... link, saved my page and then hit the link. Instead of GE firing up, I instead get directed to the Special:Upload page again. Rummaging around in the db I only found the reference to the uploaded file in the imagelinks table, due to my page reference. Posted to list and went home. This morning tried the same thing again with another *.kml file and once again got the red text. Next I tried a *.kmz file and lo and behold, it worked. I uploaded the file, no red text warning this time, although there is a warning about: Warning: This file may contain malicious code, by executing it your system may be compromised. in its description page. I linked to file in my test page, saved, then hit the link. Next thing I know GE is firing up moving to the appropriate place. I've subsequently added entries for *.kmz/*.kml to the mime.types/mime.info files. mime.types: multimedia/kmz kmz kml mime.info multimedia/kmz [MULTIMEDIA] Should I have added this mime info? Whilst looking through the mime info I noticed that IGES was there so I thought that if IGES is there , then kmz should be as well. One thing that I did notice is that after adding this stuff, that after uploading another *.kmz file that it still reports the mime type as unknown/unknown - shouldn't this be multimedia/kmz? If you've got this far, my observations are as follows: 1) For some reason MediaWiki does not like *.kml file, the ASCII version of the GE files. Should it? 2) *.kmz files are reported as being unknown/unknown MIME types even though I think I've added the mime info in all the correct places. Should this info be placed somewhere else as well? Well that's my experience with adding Google Earth data to a MediaWiki installation. I think things are now working from the wiki's point of view. Now I've just got to work out why Firefox is asking me everytime I click on one of these links if I want to open it using GE - even though I've got the "Do this automatically..." button checked!!!! Regards, Andrew Lowe