Here's an importer for Rhino that works well.
As for making adjustments to the data, it will depend on how many points.
If you can cut down the contours you need then generate a loft using the minimum you can get away with its not to bad.
The attached image shows a head I scanned, converted to a point cloud, optimised with the Points to Curves Plugin then generated a loft through the contours.
Apart from scaling it would not be to easy to modify though.