How would you get access to binary data that you can add into MMF2 apps? y'know, in the Data Elements window? Or aren't the files actually stored within the app itself?
While you're still working on the game, binary data is not stored in the .mfa itself, but it will be stored in the .exe when you compile it.
I think you can access those files by using AppTempPath$. That should return the path of the temporary directory those files are stored in. That's how I think it works anyway.