how to convert guides to lines that can have strokes/fills

I am trying to work with a document in Illustrtor CS3 that has complex lines that are in the same color as guides. They are a complex dieline of a box. I need to add strokes to them for the printer to create a dieline from them.

I am not able to apply any stroke or fill to them, but in every other way I can see, they seem like regular lines. Any ideas?