I'm glad to see there is interest in this new text. In response to various questions since I first posted:
It is similar to, but distinct from, the Rigdzin Dupa of Lonchen Nyingthig, in that it is a more extensive Guru Sadhana that includes Tsog and Protector practices, tormas, and so forth (as opposed to the simple Shower of Blessings practice performed at many Nyingma centers). In this sadhana, however, the central GR figure is not shown in union with consort, but is single, in the Nangsi Zilnon form, with one foot and Dorje hand downard. He has a more wrathful expression than other forms, and has a third eye blazing in his forehead. He is surrounded by the 8 manifestations of GR.
This sadhana was originally revealed by Dudjom Lingpa (LN was revealed by Jigme Lingpa), as part of a cycle known as Khandro Nyingthig (not older one that is part of the Nyingthig Yabzhi, but a New Treasure). At that time it was the main Guru sadhana of the Dudjom treasures. It was later rediscovered by Dudjom Rinpoche Jigdral Yeshe Dorje as a Mind Treasure with modifications, and then became known by its current name Dechen Namrol (Display of Great Exaltation).
For some reason, it was not spread widely, but Dudjom Rinpoche, when he established the ngakpa community in upper Pemakod (the Tibetan side) , specier Pefically established this sadhana as part of the central practices of his yogis there.When the community moved to lower Pemakod (the India side), he appointed one of his heart disciples, a great hidden Dzogchen yogi and Chod master names Togden Kunzang Longdrol (aka Togden Sithar) as the head of the nagkpa sangha. He was entrusted with the task of making a retreat land, building a Zangdokpalri temple and maintaining the Dudjom Lineage there, as well as preserving sacred statues and relics that Dudjom Rinpoche had rescued from Tibet at great peril. Among those artifacts were two stupas, one that contains the relics of Dudjom Rinpoche's mother and the other the relics of his root own root lama, Gyurme Ngedon Wangpo. Togden did all he was asked, but was unable to complete the temple. Tulku Orgyen P'huntsok is Togden's reincarnation and completed the Zangdokpalri temple last year. It was a decade in the making due to the land's extremely remote location at the Heart of the King of Guru Rinpoche's Hidden Lands. The Dechen Namrol sadhana remains a constant practice at this place known as Deden Tashi Choling, both as the monthly 10th day tsog and also as part of the 3 Roots accumulations that all the yogis and yoginis perform in Three Year Retreat there. The statues and stupas have also been restored.
It seems this specific sadhana is a gift to the Pemakod Dudjom Tradition, and because of Tulku's important connection to PK and this sadhana, he has done a great service to us here in the West by giving us the opportunity to connect with a unique spiritual Treasure of the Dudjom Lineage.
Definitely check out [url]pemakoddharmawheel.org[/url] for more information and pictures of the temple and statues, including the GR stature based on the Dechen Namrol sadhana, and to make a donation in exchange for a copy of the text.
If you have any questions about the June 6-8 retreat in Santa Barbara, or about the text, please don't hesitate to PM me. I'm the event organizer and I have been helping Tulku La out with the text publication.
Of possible interest is that Tulku told me he hopes to teach and lead practice on this sadhana at the Zuni Mountain Stupa in New Mexico at the end of July during our annual summer retreat there. The Zuni stupa is the subject of another thread on this forum. I would highly recommend attending if you have never been, or if you are interested in this practice. The retreat in SB, by the way, is only going to be either a $30 or $50 suggested donation for the full weekend, which includes teachings on Friday evening, lunch on Saturday and Sunday, tsog practices Sat and Sun evenings, as well as all teachings, transmissions, 24 hr mantra recitation, and probably the opportunity to purchase a copy of the text. Can't beat that, all in beautiful Santa Barbara.