The other two are
    AllowOverride All
    AccessFileName .htaccess

(http://drupal.org/node/15365)
which can be set differently depending on whether or not you want it site wide or per virtual host
and I usually set FollowSymLink, though this node recommends a better way.
http://drupal.org/node/656022

Make sure you also run a page with phpinfo() to make sure the mod_rewrite module is actually loading.

Sorry I'm not more detailed, I'm usually surprised when it works, so formulas may vary. I've included link to smarter people than me.

-Don-

On 9/5/2010 2:19 PM, Rich Shepard wrote:
On Sun, 5 Sep 2010, Don wrote:

 I usually have to make 2 changes in my httpd.conf file on a new install
to get clean urls to work. The directions linked to on the page work well,
ask if you get stuck.
Don,

   This is a local (private) installation so I can learn Drupal and build my
new site before transferring everything to the live server.

   In /etc/httpd/httpd.conf is the line:

LoadModule rewrite_module lib/httpd/modules/mod_rewrite.so

so that seems to be enabled for the server.

   In /var/www/htdocs/drupal-sqlite/.htaccess I see:

<IfModule mod_rewrite.c>
   RewriteEngine on

   # RewriteCond %{HTTP_HOST} ^example\.com$ [NC]
   # RewriteRule ^(.*)$ http://www.example.com/$1 [L,R=301]

   # RewriteCond %{HTTP_HOST} ^www\.example\.com$ [NC]
   # RewriteRule ^(.*)$ http://example.com/$1 [L,R=301]

   # Rewrite URLs of the form 'x' to the form 'index.php?q=x'.
   RewriteCond %{REQUEST_FILENAME} !-f
   RewriteCond %{REQUEST_FILENAME} !-d
   RewriteCond %{REQUEST_URI} !=/favicon.ico
   RewriteRule ^(.*)$ index.php?q=$1 [L,QSA]
</IfModule>

   Should any of the above be changed?

   Guidance appreciated.

Rich