How inside GECK I can see what changes are brings by mod?
Modified files marked by *star, but filter by this parameter find all components, of course. (and even more difficult to find some new scripts that added by mod).

I guess that remove a Master Parent-file can help: GECK will show only files affected by mod. But GECK shows an error when I try to delete Fallout3.esm.
I have looked many forums but solution hasn't been found

So, as a result, two questions:
How to remove Master Parents?
Is there other way to see what changes brings by mod?