There is a way how to copy a tree document (page) to a different site (right click on tree node and choose copy). However if a document with the same name already exists in target site the copy process creates a new document with a number in the name instead of asking if to replace it or create a new one. I would need it to be able mass change of certain pages across all my sites.

What would be the best approach to custom code this functionality?

Thanks,

Vlado