i'm also curious as to whether or not this is possible.. but as far as i know it's not.
Yes you can.
You can put the symbol on the stage and use this:
you could change the color of the circle with:
You can make a variable for the symbol so it is either to use.
2. you can create an instance of the symbol dynamically:
see file here:
(see code in symbols anf also the timeline or in the code window.
3- and you can do more but this is a start.