Hello,
thanks for reply.

In fact, the website I am trying to save has several mirrors, and some of
these mirrors are down, but the links in pages are still sending you at the
down mirrors. The webmaster didn't change the links, but he says we must
replace mirror1.host.com and mirror2.host.com by mirror3.host.com.

It is why it is very important to replace these links.

I didn't find the file external.html, where that's file is ?(And I didn't
understand how to replace the two links).

Thank you for time you take for my problem!
Bye.