Check this link, this explains the Loft method which is extremely usefull for useing cross-selections of fuselage formers etc. This method is very accurate in designing nose sections, fuselages and alot of surfaces that may consist of a constant curve.
http://www.fsalpha.com/gmaxFSvideo/produced/flash_videos/nose_cone.shtml
http://www.fsalpha.com/gmaxFSvideo/produced/flash_videos/nose_cone.shtml
This video wich i did have it to write it down (to remember some stuff)its been very useful AS the boolean stuff now i make holes everywhere(

still the double shape curve of dc-9 or b747 but im working on it,I did a PLANE for some of who didn't notice or remember,i mean i did learn the worth part(hieratry and Chain) Animating landing gears tail rudder weels etc now is a MODELING & painting