Tutorial - Creating Conic surfaces using shoulder curves in Creo Elements/Pro aka Pro Engineer Wildfire?

Here is the Tutorial.
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Step 1:
Start Creo element or pro engineer in part mode.
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Step 2:
Offset the top plane by 200mm.
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Step 3:
Offset the top plane again by 200mm but in opposite direction or input -200mm.
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Step 4:
Select DTM2 and then Sketch.
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Step 5:
Draw a spline and exit the sketch.
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Step 6:
Select the Top plane and then Sketch.
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Step 7:
Draw a spline and exit the sketch.
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Step 8:
Select the DTM1 and then Sketch.
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Step 9:
Draw a spline and then exit the sketch.
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Step 10:
Insert>>advanced>>conic surface and N-sided patch.
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Step 11:
Select conic surface and then shoulder curve and then click Done.
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Step 12:
Select boundaries and then select the splines in DTM1 and DTM2 while holding down ctrl key.
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Step 13:
Now click on Shoulder curve and then select the splne on the top plane. And click done curves.
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Step 14:
Enter the conic parameter value. Let's enter a value of 0.7.
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Step 15:
Click OK and surface is generated.