I would have thought it would be an easy job to open that file, find the folder for Melbourne and save that as a new KML file. 2 minute job really. Even if no folder existed you could make one then drag and drop the locations you want into the folder and save it. Easy as.
I use Google Earth at work all the time. Hit me up if you have questions about it.
Your first tip is asking for locations wont get any replies. Urban exploration. Not urban tourism. - Echo