In XnShell ext there is the lovely feature of "File's Icon" that can display the root directory path of any file's embedded/linked icon. For example;- .jpeg files associated with XnView it would display to the user that the icon is embedded within C:\Program Files\XnView 1.9x\xnview.exe,5 - same thing for any Windows registry registered file-type that has an icon on Windows this feature works for.
Ok, the "File's Icon" feature is a 'Windows-centric' feature in it's current existence but maybe there is a way of getting the same information on Mac OS too in where the icon files on Mac tend to be within a resource folder rather than embedded inside a binary file.
Perhaps, Pierre, on top of the same "File's Icon" code, for MP specially only you could consider adding an 'Extract' button for the feature to be able to extract the icon file (Windows) just like how resource apps can do this (e.g. even ShellToys's "view icons" feature does extraction).
I am suggesting the "File's Icon" would be for the right-click menu in the MP Browser.

I'm currently using MP 0.38.7 - win xp sp1