because when u already have a modified mul it's VERY much work to extract and import a larger amount of objects..
ok. Let me give you an example. You have an art.mul with about 200 static art modifications. You have to agree, this is a lager amount, right?
ok.. now lets say you get an art.mul with ...

Sometimes you get a filled mul (e.g. an old project dies and publishes it's muls or someone just fills muls an publishes them).
It would be great if we could use the fiddler to copy content from one mul to another. especially inside the art-mul (including tiledata). These files are edited in the ...