I compared the script /conf/dokuwiki.php from the original DokuWiki tgz at
http://www.splitbrain.org/projects/dokuwiki with the /conf/dokuwiki.php created by the RPM / yum / yumex install of the package dokuwiki-0-0.7.20101107.a.fc14 and realized that the only difference is the definition of the data directory.
So I made up this workaround:
(Become root to do steps 03 to 09.)
01 _ Install package dokuwiki-0-0.7.20101107.a.fc14 (and possibly dokuwiki-selinux).
02 _ Download the original DokuWiki tgz at
http://www.splitbrain.org/projects/dokuwiki.
03 _ Copy the script install.php from the tgz archive to /usr/share/dokuwiki
04 _ Symlink from /usr/share/dokuwiki/data to /var/lib/dokuwiki/data
05 _ Rename /usr/share/dokuwiki/conf/dokuwiki.php to dokuwiki.php.bak
06 _ Copy the original script /conf/dokuwiki.php from the tgz archive to /usr/share/dokuwiki/conf
07 _ Rename /usr/share/dokuwiki/conf/local.php to local.php.bak
08 _ Rename /usr/share/dokuwiki/conf/users.auth.php to user.auth.php.bak
09 _ Rename /usr/share/dokuwiki/conf/acl.auth.php to acl.auth.php.bak
10 _ Call /dokwiki/install.php on your http server.
The script install.php will guide the user through the setup process of DokuWiki and will arrange for a default DokuWiki user.