[MXV8i SS3] add spiral on existing alignment, continue from unfinished HA and Visualization from Old MX Model

Dear All,

Few Questions on Openroads Technology (MXV8i SS3 Au, 08.11.09.494),

1. How to add spiral length if horizontal alignment was designed without adding the length info during the horizontal geometry-Complex by PI?
2. How to continue my alignment from unfinished horizontal alignment, using horizontal geometry-Complex by PI?
3. Can I bring complete road design model (MXV8i SS2) to OpenRoads and continue to visualization?