Copy assembly with the drawing

Hi,

Can you suggest what would be the most proper (and practical) wayto create a copy of the model and associated drawing withoutmessing with existing ones?

The same question I would like to ask regarding assembly model andassociated drawing. How to keep BOM without changes if I removesome parts from assembly, and if I added new parts, how to add themat the end of BOM to avoid changing all existing balloons? Is itpossible or can be done only manualy?


Thanks a lot,
MarkSolidworksAssemblies