15 card spread question

Aun

Greetings,

I've read about the 15 card spread on http://www.supertarot.co.uk/ and also on the LWB the comes with the deck, but I still haven't figured out how to address the elemental diginities issue.

In other words I am still a little lost when trying to interpret the cards as ill or well dignified.

I understand how the elements interact with each other, but when the cards are grouped in blocks of 3, I get lost on where to start, or if I should consider the spread as a whole, etc.

If someone knows about any specific references to this issue, please let me know, specially if its available on the net.

I just bought the brand new book Understanding Aleister Crowley's Thoth Tarot from Lon Millo Duquette - a great book - but it doesnt cover the subject in question.

Blessings,
Aun