Hey Miguel
Do you still need them linked? You could just break them all and then archive.
If you want them linked then you will need to relink them in PlotMaker. When you copy a layout book and it's linked AC project, the link doesn't copy with them, much to my chagrin! That is to say that the lbk will be linked to the original pln, not the copy. I have submitted wishes/bug reports to GS regarding this issue on many occasions!
I have found also that PM's Drawing Usage>'Read All From...' command functions unpredictably - so to be absolutely sure, I'd would recommend selecting all views and using the 'Link To...' button, then finding the copied pln manually. Until GS improves the 'Read All From...' command. Thing is, if you have multiple pln's + OLE's, it can become somewhat of a task!
Hope that answers your question.
Cheers,
Link.