The 
Shape2Earth icon editor for creating KML files has been greatly enhanced recently. Users now have an interface that is very similar to the one they use in 
Google Earth, and the ability to add their own custom icons to point data.
New icon selection window pulls icons from the Google Earth folder
Custom icons can be added to the pallete 
 Custom icons will stay in the icon window for later use
 Shape2Earth icons can be changed when the user 'hovers' over an icon in Google Earth