Instantiating a library symbol on the stage at runtime?

How do you do it? That is… I have a movie running… If I want to say, drag one symbol to a location (an icon from an icon bank if you will) and on the release of it, i want another symbol from my library (as of yet not in my movie) to appear on the stage, how would i do it? I figure i will need actionscript, but i have just started working with flash not too long ago. Will i need to create an object or what? I guess this forum is all Flash MX, but if not, that’s what I’m using.

Basically i just need to know how to make a symbol from my library manifest on the stage wherever during run time…

right click on the movie clip on the library and go to ‘linkage…’
select ‘export this symbol’ and give it a name.
then use ‘attachMovie’ to place that movie on your stage at runtime.