Editting Google Earth's Default settings for real-time GPS Tracker
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At the moment I'm trying to use Google-Earth's real-time tracker. I'm having good success so far. I can get GE to put a dot down at each GPS point and it updates in real time but: 

The dot is an icon that I don't want. 
The dot label just says "position" which I'd like to change. 
The default setting for the display to the "fly to view" every time you refresh which prevents me from zooming in or out on the movement of the dot. 

I have found the KML file that GE is using to make this information here: 

C:\Documents and Settings\ ~~~ \Application Data\Google\GoogleEarth\realtime

but if I edit that file it gets over-written instantly. In short, I know in theory how to make all the changes I want to a single KML screen-shot, but not how to change the default settings of this so that the when I start tracking the GPS single, the dot is always the icon I want and always has the label I want. 

Sounds like I need to edit some default settings around or maybe just edit a master KML file or something, just don't know what or how. 

If the above is not possible, 

How would I create my own version of this? How do I get a KML file to update with new information without having to re-load hundreds of the things. 

TIA

Dave. 