I can mirror a site www.a.com, but I also want to mirror any links from
www.a.com to www.b.com and that subset of www.b.com (not whole of www.b.com)

In the filter I have
+www.b.com/*.html 
and that retrieves the html, but I also want it to scan those html files and
retrieve all subsequent links on the www.b.com domain. How do I do
this?+www.b.com doesn't retrieve anything.

Thanks for any help.