A lot of Schionnings have a Code zero track for sheets running about 1 metre outside of the headsail sheets. I don't push mine that high so I lead my sheets outside everything, but if I wanted to use it sailing high in light winds I would have to put it inside the shrouds. It aint rocket science, lead it inside for tight angles and outside to the gunwale for deep angles. If it has a torque rope luff then it is probably a Code zero thing, it doesn't really matter what it is - as long as it is extra sail area for sailing at beam or broad reaches then almost anything triangluar shaoped like a genoa will do. I met some people from NZ on a Tennant who just used recut old light number one genoas for code zeroes - it worked well.
A couple of photos would be good.