If you plan to write or edit any documentation with emacs, install a customized emacs configuration file with DocBook commands in the skeleton directory, so it will be used for all new users. The file also fixes the backspace -> help mis-mapping that often occurs in terminals.

[root@yourserver tmp]# cp /tmp/openacs-5.0.0a4/packages/acs-core-docs/www/files/emacs.txt /etc/skel/.emacs
cp: overwrite `/etc/skel/.emacs'? y
[root@yourserver tmp]# 

Debian users:

apt-get install psgml