Setting up virtual wireless interfaces using command line

Hello all,

So, I'd like to configure separate WLANs with seperate BSSID using command line. I have looked at many guides around and only find them starting with 'So, i have a wl0.1 interface...'. Ideally this is what i'd like to run:
brctl addbr br1
brctl delif br0 wl0.1
brctl addif br1 wl0.1
ifconfig br1 192.168.2.1 netmask 255.255.255.0
ifconfig br1 up

However i'm not sure how tomato enables the wl0.1 interface in the first place. I'd like to enable this using command line, please help.