Create a drawing and use the following settings of the Drawing View;
Display style = No Hidden
Tangent edges = dimmed (your choice)
Hidden line removal for quilts = No
Skeleton model display = Hide
Colors come from = the drawing
Weldment xsection display = Hide
The final drawing image will show just the exterior lines.
I've also found that when assemblies are imported into PorE, one should select the layers option. This will allow the user to blank and unblank layers to show or not show features of the IGES item.
This might work. I have not tried it.I don't have an IGES file handy. Redefine the IGES feature in the Pro/E part changing it's attributes to "Make Solid". If that does not work, you might have to use the Feature>Create>Protrusion>Use Quilt option. I also liked the idea of putting the IGES part on a layer and blank the layer in the views where it is showing. Before blanking the layer, you might want to Use Edge to show some of the component.