How to edit videos keeping existing geotagging? Videos recorded with an iPhone or with other GPS-enabled phones gets geotagged as they should. When I trim/crop/edit them in iMovie (iLife '09) the GPS tags are gone.

How to keep the tags despite editing or is there a program to add back the geotags to the movie afterwards?
You can geotag videos with Picasa, but I don't know if the geotag is saved along with the file...