Okay, what I'm imagining is this. I don't know if it's what Alex is talking about, but it would be interesting anyway.
Take a bunch of index cards and write a position word or phrase on each one. For example, on one card, you can write "Past influences," on another you could write "Hopes," etc. Do as many of these as you wish. The more the better. Borrow phrases at random from your favorite spread book, or from different spreads on this forum.
Put the index cards in a hat or shoebox or bag and shake the container up. Pick one index card. Then draw a Tarot card and place it on its index card. The words on the index card are the Tarot card's meaning assigned for this spread. Match up as many index cards to Tarot cards as you wish for the spread. Then read the cards.
The number of combinations of index cards possible for a simple three-card spread could be astronomical, depending on how many index cards you make up. So you could end up reading your Past, Present, and Future regarding your situation....or you could end up reading Past, Helpful People, and General Advice; or Hopes, Challenges, and Others' Perspective of You... etc. You get the idea.
So it would be sort of a double-layered oracle: One level is the Tarot cards that you choose, the other level is the positions you choose.
Hey, now I'll go off and try this!
-- Kyrielle