KML Update via NetworkLink and NetworkLinkControl?

[mic...@ijet.com]

Following the KML update example, I have 4 KML files as follows:

1 - KML file that contains a NetworkLink pointing to a KML data content file.
2 - KML file containing the data (including id tags for items that I wish to update).
3 - KML file that contains a second NetworkLink pointing to a KML data update file.
4 - KML file that contains a NetworkLinkControl with Update tags that point to data contained in KML file #2.

The display of the KML and the updated KML works great in Google Earth, works great using the Google Earth plug-in, but I can't seem to get the files to work in Google Maps. The combination of file #1 and file #2 works great and the initial data is displayed. However, there doesn't seem to be a way to handle file #3 and file #4. I have tried just creating a different KmlLayer instance, but that doesn't work.

Does anyone have an example of using the KML update facility described above in Google Maps? I have reviewed the information available at: http://code.google.com/apis/kml/documentation/kmlelementsinmaps.html and http://code.google.com/apis/kml/documentation/updates.html, but can't seem to piece everything together in Google Maps. Any help is greatly appreciated. Thanks,
Sean