I am quite sure that either asus or Kfurge already have done what is needed to eliminate the need for:
Furthermore, the documentation you mention is not well kept up-to-date. I would rather refer to:Add the line below to free up more cpu time. It should be added in the section that only runs once on reboot.
echo "interrupt=no" > /proc/miscio/power_enable_config
http://wl700g.homelinux.net/drupal/?q=node/134
regards,
Marc