ALso...
I forgot to mention that the more advanced packages of SW has "feature works" which I think builds the feature tree....turning the dumb model into a usable tree....at lest that is my understanding. Again, untested by me since I have the basic version. For the times I had to transfer, I ended up re-modeling. One command that is VERY handy is the "convert entity" sketch command. You can select the face of the dumb part, and "convert" traces the profile into the sketch, and you can extrude the same part. I think I ended up turning relations off and suppressing the original dumb part after the convert.
Paul