okay by accident i discovered NAS finally gave me some options
the NAS included in the WL500g serie keep its mouth shut..

to mention, NAS commands seem to differ a lot from version to version

Code:
# nas
Usage: nas [options]

        -l    LAN interface name
        -i    Wireless interface name
        -k    Shared secret
        -m    0:Radius, 1:WPA, 2:WPA-PSK, default:Radius
        -g    WPA GTK rotation interval
        -h    RADIUS server IP address
        -p    RADIUS server UDP port
        -s    Service Set Identity
        -w    Cryptographic algorithm

The -l <lan> option must be present first and then followed by -i <wl> ... options for each wireless interface