If yours is wired like #6 you do not have an available neutral . That means you can’t wire switches directly to your load unless you use a switch that doesn’t require a neutral.
However, there are other options, like micro relays that you could wire into the light with the power from breaker. You can then use the wiring available to still use the existing switches to control the lights.
As long as you can get a 2 wire cable from either light to either switch box you are good. Or replace the 2 wire line in diagram 6 from switch box to light with a 3 wire.
Just so i understand this correctly, I need to hook up the master switch like the GE single pole and then just need a traveler and neutral connected to the auxiliary?