Help with retopoflow addon?

I wasn’t sure where to post this, but it is a modelling and topology issue.

I have photoscanned a mesh, and imported it to blender. I need to retopologise the model, keeping the UVs intact so the image texture still works (I was most likely just going to bake the two models together for this).

For retopology I chose retopoflow, but there’s an issue.

I need to be able to use both polypen and polystrips on the model, and they don’t seem to be able to work together. Are users really expected to use ONE tool for an entire complex model? Am I missing something and does anyone know how to use this?

Thanks.

No. Don’t even have to use retopoflow for it.