Regarding Golden Dawn and AP,
I know that Golden Dawn tought a technique which is actually a form of phasing and predated Monroe by about 70 years. It involves visualising certain shapes, like a yellow circle on a blue background (not exactly that but you get the idea) and so on. If the individual visulised these for long enough he/she would find them selves able to move within it (in their mind's eye) and from there into the astral itself. There was a whole series of these shapes which opened up to various parts of the astral.
I don't think the technique you are describing is the same as this one of course. The above one is for direct access to the astral, what is now called 'phasing', whereas the technique you describe sounds like a method for OBE to the Realtime zone. I would be interested to hear more about it!
Regards,
Douglas