It wasn't immediately obvious to me how to install Metaphile, so I
thought I'd put together a short guide for the requirements and how to
install, then briefly touch on how to call the classes.
1) Ensure you have a working copy of Flex Builder (instructions here:
http://actionscriptexamples.com/2008/12/18/using-the-flex-sdks-objectutil-class-in-your-flash-cs4-documents/).
Without Flex Builder I was getting error messages about ILogger not
being found.
2) Grab the latest svn of Metaphile (instructions here:
http://code.google.com/p/metaphile/source/checkout)
3) Extract src/Metaphile/com to your project folder (i.e. extract the
com folder to the same folder that YourProject.fla is located).
4) In the actions panel for your project, import metaphile like so:
import com.metaphile.*;
5) Call one of the classes, like so:
var myID3Reader:ID3Reader = new ID3Reader();
If all goes well you should be able to debug/run your movie without
any errors.