Paneling on Surface

Hi guys I am relatively new to GH/Rhino but experienced on other Softwares & Scripting. My question is i have follow the tutorials on the paneling tools to panel a surface but seems as they are all regular while mineis not which is causing some weird stuff. First my surface is not a rectangle but it has a pinch on both ends and cuts along the center; the paneling is created succesfully but it goes out of the boundaries of the surface; is there a way to bounded ao it stays withing the boundaries even when the surface is irregular?

Ps: Will post some Pics and the files tomorrow im case.

Thanks in advanced.