Ok I see. I use AutoCAD and Autodesk Inventor. I think I can show the wire frame for the lofts in Inventor, I did show them in the picture set I posted to this thread earlier. The first solid section was a set of increasing size elipses. The strategy I use in solid modeling is to use several different lofts to add features of the model, I use simple shapes(primative shapes ie sqare, rectangle elipse circle etc.) to achieve this. Now I started in AutoCAD in the early nineties with solid modeling that was constrained to simple extrusions for structure(formers, stringers etc) and surface modeling to see the complete shape. I did a little surface model tutorial in the workshop that will help in this area.
The link is: http://www.rcgroups.com/forums/showthread.php?t=284851
Read this and if there is still some holes in what your are trying to achieve we can see if I can or anyone else can help.