In NX 12, model edges are automatically extracted to the drafting views, this means you probably do not need this project curve to do what you want.
In older releases , one needed to toggle on the extracted edges option ( per view) to be able to snap to the model edges in the drafting views, or you could project the edges to get associativity and "snap-ability".
The extracted edges also means you can load the drawing file without loading the model to add annotation, sketches, viewing, plot, export etc.
Regards,
Tomas
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