Independent fogs?

I have seen people do this to work on parking lights and high beams but does anyone know how to make them fully independant regardless of other lights? the reason i ask is i am putting on jdm projectors and want to run my city lights and a set of halos through the same switch.

http://legacygt.com/forums/showthread.php?t=136357

 

http://legacygt.com/forums/showthread.php?t=136753

so the mod that connects them to the parking lights makes the switch in the cabin useless correct? i was hoping to keep it functional

Ok dont quote me but im pretty sure your gunna have to do some tricky wiring to do this. The fog lights button grounds itself in the light switch. So when the corner lights are engaged you can turn on the fogs because the circuit is completed. So the trick is finding which wire connected to the button is to that ground. Then once you have found it, you just need to cut it and give it a permanent ground. Then the fog light switch will work independent of everything.

So what makes them turn off with the high beams?