Topic: Atheros DIR-825 enabling the Guest wifi zone

I've been hanging around these boards and Google searches for almost a week trying to find an answer to what I want to do.

Basically what I want is to enable a wifi guest zone that is running beside my usual Wifi LAN.
I'm running OpenWRT openwrt-ar71xx-generic-dir-825-b1-squashfs-backup-loader built on 12th of august, which seems to be the lastest.

I just want to enable a wifi zone on the same 2.4Ghz net that my regular wifi is, a guest zone that can only access the internet and no other client on the net.

I seem to be in over my head, using Luci to configure something like this person has done here:
http://factorialfive.wordpress.com/2009/07/08/two-wireless-networks-with-wrt54g-and-openwrt/

But I can't quite connect the dots to do the same on my own router.

my /etc/config/network:

config 'interface' 'loopback'
        option 'ifname' 'lo'
        option 'proto' 'static'
        option 'ipaddr' '127.0.0.1'
        option 'netmask' '255.0.0.0'

config 'interface' 'lan'
        option 'ifname' 'eth0'
        option 'type' 'bridge'
        option 'proto' 'static'
        option 'ipaddr' '192.168.1.1'
        option 'netmask' '255.255.255.0'
        option 'defaultroute' '0'
        option 'peerdns' '0'

config 'interface' 'wan'
        option 'ifname' 'eth1'
        option 'proto' 'dhcp'

config 'switch'
        option 'name' 'rtl8366s'
        option 'reset' '1'
        option 'enable_vlan' '1'

config 'switch_vlan'
        option 'device' 'rtl8366s'
        option 'vlan' '1'
        option 'ports' '0 1 2 3 5'

config 'interface' 'RADIO0'
        option 'proto' 'dhcp'
        option 'type' 'bridge'
        option 'ifname' 'wlan0'
        option 'defaultroute' '0'
        option 'peerdns' '0'


Any help on how to achieve this the simplest way in Luci would be welcome.