SS4 Create 3D geometry from SS2 .alg files

I have a .alg file with H and V alignments made in SS2. Without making surface for it, I cannot obtain any 3D view.

In SS4 I know that 3D geometry is possible to receive.

How can I make 3D geometry in SS4 from .alg files?

Main task is to get profile views with crossing features, which features will be centerlines from this .alg files.