Trimming surfaces

Hi everybody, I trimmed a surface with some curves with the vb script suplied by vicente soler in a previous thread, now what i've trying to do is to divide the resulting trimmed surfaces in to more surfaces using the subsurface and int2, however, the trimmed parts of the surface reappear.

in the same thread the same question was asked , 2 solutions(also by vicente) came up. they were to include either the center of each surface or the 4 corners; however, as you can see in the imagethese will not help because what i need is to only divide the surfaces vertically so neither the center of the new surfaces nor the 4 corners of the surface will be inside the surfaces.

Any help would be appreaciated, i hope i explained what i'm trying to achieve here, just vertical divisions of the new surfaces like image 3

thanks again

Diego