I was playing around with Feature>copy>new references>from different model> Independent. These are my results - It copied features (sequential features) with no problem. ex. In part0002.prt, I copied the first 3 datum planes and 8 2d datum curves into prt0003.prt remember these are all sequential. In prt0003.prt there was no merge showing, just features. These features were redefinable, I could modify any features; every thing look like I had created the features as normal. All I have to do was define one sketch plane - it must have been the first datum curve because the 7 remaining curves used the same datum plane to sketch on. I will add to this post as I learn more. Texaspete.