ez-ipupdate already supports the zoneedit service, so all that is required is to add it to the dyndns_show.html web page and ddns init script.
/var/www/admin/content_en/dyndns_show.html changes:
<select name=”ddns_service” style=”width:200px”>
<option value=zoneedit_com>zoneedit.com</option>
<option value=dyndns_org>dyndns.org</option>
<option value=dtdns_com>dtdns.com</option>
<option value=noip_com>no-ip.com</option>
</select>
/etc/init.d/ddns changes:
if [ “$DDNS” = “zoneedit_com” ]; then
/bin/ez-ipupdate -i $EXIF -S zoneedit -u $USER:$PASSWD -h “$HOST” -d -P 300
exit 0
fi