import dxf into a new proE native drawing.
save the drawing.
While in sketcher mode...
> SEC TOOLS > COPY DRAW > (select the newly created drawing) > select the features in the drawing that you want to include in the section (PICK MANY) > and then drop it into the section and autodimension.
Another way to document a part at varying stages of mfr. processes is to create "instances" of a part through the family table. The "generic" model would then represent the finished product, and each individual "instance" as defined in the family table editor would...
I rep a design firm that had the same needs for vector based format support, and it seems like we jumped through the same hoops--very frustrating.
(Warning: commercial bias introduced, please delete if not appropriate)
Then along came Adobe Acrobat 4.0. Acrobat creates a printer driver...