lost my views on models and drawings - help

Hi there

I've done a selection of models / assemblies for one of our customers of which these have all been made into manufacturing drawings. The problem I have is these drawings were all done to the customers Dwg No's now they have requested we create our own Dwg No's, so I re-saved the files under the new No's but now I find that my assemblies are no longer there, all the mates are grey'd out because the original files cannot be found and also the drawings are the same, when I open I get a blank page? is there a way I can link the newly named models to the drawing/ assemblies or do i have to create new drawings and assemblies?

any help or advice would be greatly appreciated

thanks

Craig

SolidworksDrawings And Detailing