@Frindle. Yes, I do the "full GD" thing with the cards, as per Tyson/Portable magick. With some tweaks.
Having done the "GD" Lesser Banishing and Banishing ritual of the Hexagram several times a week for about 1 and a half years, i found this alternative very effective and refreshing; I think because of my deep and old connection with the tarot cards.
And to the person who's having trouble with the "bi-locating", i.e. keeping focus on the astral while having eyes open on the physical cards...nah don't worry about it. I don't really "look" at the cards, any more than i do physical tools/altar when I'm doing it that way. The physical cards are mere placeholders on the physical plane...which helps manifestation come thru, if you are even trying to manifest something.
So much of magick (ceremonial, at least) is like spiritual calesthenics...just growing stronger as a magical being, stretching your muscles, as it were; By visualizing, we grow in our ability to visualize. And I've learned that astral "seeing" is not at all the same as seeing with our physical eyes...not even like dreaming; though dreaming is astral seeing in the extreme degree. But astral vision can be more like "feeling" something is there, even if you can't see the extreme detail. And the less I worry and the less I TRY to see the detail, the more I see it with my feelings. Remember, IMAGINARY. The astral IS the imagination...quite literally...so if you can't see it, IMAGINE that you can, and you do; it's that simple.
But yes; I've done both the full out GD ceremonials, with the tools, and the Tarot version, and find the Tarot version to be quite sufficient. (Further, I've found the wicca/natural magic versions of tarot magic to be quite WAHOO too!) Just watch out and make sure you are very specific, because I've seen this kind of magic go very awry, too...much to my detriment. That's why I like the GD stuff...good banishings. But Now I always start with asking my guide/guardians to move my ritual for my highest good, and to add thier power unto my own, for my highest good only. I think that helps it go better.