Hi Ug,
Here is another take on Michaels original method... I find it helps me when I am visualizing from a surface.. It is done by creating a plane with the proper amount of points, then moving the points around... So I just drew a square, with 8 equal points per side, then ran network on the lines. This makes a plane with a grid of points I can move as if they were lines.. I can form them to the curve of the body in some areas to help me shape the bulge. I then cut off the harder curves with a boolean operation. This is the same as the lofting of the lines, then manipulating the lines to update the surface.