Hmm here is an idea. Why not have layouts 1-10 drawings already created and the xref's linked to the your base drawing? Because each project has it's own unique project.number, you will still have to relink just the one base drawing in each of the 10 layouts. So basically when you start a new drawing, you should have those 10 layout drawings with your company boarder already created, of course you will have to adjust the viewports unless you copy the viewport over in each layout. You can either design in your base drawing, with some layer management or you can create in different design in each of the layout drawings. This is just a thought, I'm sure there are other ways to achieve what you are looking for.
Tony Carcamo
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DFW BIM Infrastructure User Group
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It seems to me spliting 1 floor plan into 10 different dwg files is inefficient and was a way people worked with when AutoCAD didn't have multiple layout function. I would suggest your manager to adopt one file per floor plan, just to match the architect's drawing.
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