transferring imported solid surface boundaries to a sketch plane

Is this possible? I am trying to LOFT? a planer surface on an imported solid to an offset plane. I can highlight (select) the target surface but Extrude wants a direction that is not selectable or definable. I have tried to create new lines using the Imported Planer Surface boundary. I tried to extrude to a plane, No soap. Used the IPS to create a sketch plane and created boundary lines on that, tried to extrude to the target plane, No soap. Tried to simply extrude the highlighted IPS a specific distance or to an offset place, No soap. Whatever I am using to create or select the lines I want to use doesn't seem to be usable when I want to use them. Not having fun. Give me a hint, send me a link, tell me how to do it.

Edu