Here is my issue:

I have just started working on a website that has existed for 3 years created updated and maintained by those using DNN (many part time and short term employees).  After making an analysis of the site, I have found many pages that are essentially dead and need to be removed.  The pages that need to be removed used to belong to one administrative area and through various restructures, the information/function now belongs to another area.  Many pages reference the old outdated links. We have no one who has a complete list of who owns which pages, portals, etc, so contacting those people to remove the dead pages is impossible. 

Q1:  Is there a way to search the DNN database to find which pages reference the dead pages (I have the URL for the dead pages).

Q2: Is there a way to do a Global replace of the all the dead links with the correct live link?

Thanks in Advance for any information ---