In the case you have coordinates only then you will never import them as elements. You can import theses coordinates and then create the alignment manually based on these points with different methods (Elementmethod or Regression). Once have created an alignment then BRT supports have a look at the reports which file format can be imported. There is a macro available AlignmentFromASCII.dll which supports the old InRoads format. If you don't have success please submitt your data.
Gunnar