What you've setup is two seperate named virtual hosts with two seperate document roots. The document root is the base folder where the sites documents live. In addition to the document root there is another directive in httpd.conf which defines the names of the default document(s) for the site. By default the list includes index.html but not index2.html. So....
"DocumentRoot /www/scribner.org/index.html" should actually be
and "DocumentRoot /www/scribner.net/index.html" should be
The default page in both those folders should be named index.html. If you really want to use index2.html you could change the VirtualHost stanza for scribner.net to look like this:
I'd suggest picking up a good apache reference if you need to get any more complicated.