Hi there,
I'm actually not sure about this.
I think it's either a case of being able to load them into the unit from a csv file using the Garmin POI loader, or it may be the same procedure as for the earlier streetpilot models where you need an actual overview map (not very handy)
Try downloading the Garmin POI loader from Garmin.com then using a site like
www.flitspalen.nl to get the camera database as points.
HTH,
David