1st, I created my outline, 3D of course, then I patched my quads, or tri's if that is what you choose. After I finished patching the one side, I mirrored the mesh to get the other side. Very simple process. This is an example of lightwave splining. In carrara, you can make the outline in the spline room and not even have to patch it as it does patches as you work. That is a very good tool to have as you are not limit to tri's and quads so you will have instantly smooth cross sections, but it gets confusing when creating you outline because there will be patches in the way, also the axis in Carrara can throw you off. Just make sure you stay oriented. Now in the modeller room, there is a patch command, but I have never gotten it to work. It always crashed the program. I have not used Carrara in a while but see if you can create your outline without polygoning your spline 1st. If you can, it will make creating the outline alot easier. The turn on the polygons when you are done and WALA! instant splined organics.