Cul-de-sac as a civil cell?

Hi :-)

I´ve already made some simple T-intersections civil cells with liniar templates aplied, they work pretty well.

Now i´m trying to make a Cul de sac as a civil cell, wich is a bit more complex and i´m sorry to say that i´m stuck! So any help would be great. The edge of pavementlines are defined by the constuctionline so the move parallel to the centerline when i move it around. How do i create the curve geometry so it´s also follows the centerline? Is this the correct way to do it at all?? as a civil cell i mean.

I have another question as well, i´ve placed the dgnlib files containing the civil cells in the  CIVIL_CELL folder, but the list is empty when i use the place civil cell command. Any ideas?

Regards.