Well....just in case anyone's interested, managed quite successfully...! Imported all the XYZ co-ords by manually typing them in to the new nodes in the second project, having copied them out to excel. Then solved the spline control problem by importing the jpg of project 1 with all the nodes selected (so that it shows the spline points), that way I can match the spline control points of the new nodes over the image of the control points from the screen grab of the old nodes............ in top view it's just a question of aligning, and in side view it requires a little bit of eyeballing, but it worked a peach.