tootsrey,
I'm not familiar with solprof, so I don't understand your question. When I change files from 3D to 2D, the line styles stay the same through the conversion: if a line is style 2, it stays style 2. Try setting the view on the 3D file as you want it shown in the 2D file (I think that maybe the active view is used to determine which plane is exported to 2D) and then exporting it to 2D.
Sorry I can't help more!
Matt