Here is a quick outline of the steps. I suggest that you work through the tutorials and videos (Retrieve) related to corridors for more tips. A link to these can be found on the support tab. Your dealer may also be able to arrange some additional training.
Create an alignment (HAL) using a line
Create a surface profile using the hal
Create an alignment profile view of the hal
Create a new line in the profile view or use the surface profile just created
You must create the line in the profile view using the same stationing of the HAL
If needed move your line in the profile view to the correct beginning station
Edit the alignment (HAL) and click on the vertical tab
Click on the create vertical alignment button
Click on the append to alignment command icon
Pick the append vertical option
Pick the line from the profile view
A HAL can have multiple VALs
The controlling VAL is set in the property of the HAL
Hopefully this outline will get you started.