What follows is my personal redaction of The Bornless Rite. Much of the modifications come straight from a version written by Regardie, found in the smaller black Golden Dawn book (as with everything else on this blog, I make no claim to great originality - nor would I consider this a "new" version of the rite, it's a slight modification at best).
This is a version that I've been using on a very regular basis for quite a few years, and which I have found to be very effective. I post it here with the simple hope that it might inspire at least one other person to create their own personal modification. Regardie's version inspired mine, maybe mine will inspire somebody else's. Needless to say, there is no reason to perform The Bornless Rite until one has had quite a few years of practice with the basic techniques that comprise it, as well as a mastery of some more general synthesis of the elements through spirit (the Watchtower Ritual, for instance, provides this).
The temple is arranged with Enochian elemental tablets in the quarters. The Tablet of Union, placed on top of the Sigillum Dei Aemeth, sits on an altar in the center. Placed around the sides of the Tablet and Sigillum are the elemental weapons (used for the elemental invocations), with the Lotus Wand (for spirit) on the right and the Mars Sword (here for balance) on the left. For planetary workings, I like to put the Sigillum on top of the Tablet of Union.
A quick read-through of Crowley's Liber Samekh will provide details left out below (for example, when letting fly with the barbarous names, use the proper magical tool to send a current of will blazing through the pentagram, extending exponentially with each name until it transgresses the limits of the space). This is a ritual which, once thoroughly mastered in the physical, does benefit quite a bit from performance on the astral.
This rite is endlessly adaptable. It is perfectly sufficient in itself to exalt the consciousness and fortify the spirit if used regularly over time, though it is also useful as an opening for every type of ritual. Typically a ray of light is directed upward in the penultimate section (in the God form of Thoth), up beyond the tops of the pillars and into the infinite Light above, while the aspirant is made to rise into that Light in the final section. For talismanic or Eucharistic work, the light can be brought back down into the aspirant in the final section, and directed, through the aspirant, into the talismanic base. Alternately, the talisman can remain covered throughout the entire ritual, and the intended force can be invoked after the final section as in a more conventional talismanic consecration, after which point the talisman is uncovered and imprinted with that force (assuming it's been neutralized by water and fire beforehand).
There is no God form listed for the final section, but there is indeed a God form that is used with that section. This form will come with practice, it is nameless and has no specific colors or characteristics, it is the Lord of Yetzirah and commands all of the spirits. The other God forms are Yetziratic images reflecting a Briatic archetype, so with the final God form (though you might say the source in this case is based in Atziluth).
The Bornless Rite
Begin in the center, East of the altar:
Thee I invoke, The Bornless One
Thee, that did create the Earth and the Heavens
Thee, that disdst create the Night and the day.
Thee, that didst create the Darkness and the Light.
Thou are ASAR UN NEFER, who no one has ever seen.
Thou art IABAS
Thou art IAPOS
Thou hast distinguished between the Just and the Unjust.
Thou didst make the Female and the Male.
Thou didst produce the Seed and the Fruit.
Thou didst form Men and Women to love one another, and to hate one another.
I am [motto], Thy Prophet, unto Whom Thou didst commit Thy Mysteries, the Ceremonies of The Magic of Light.
Thou didst produce the moist and the dry, and that which nourisheth all created Life.
Hear Thou Me, for I am the Angel of Nu, of Had, of Ra Hoor Khu: this is Thy True Name, handed down to the Prophets of The Sun.
Pass by North to East:
Invoke Spirit Active (EXARP, AHIH) and Air (ORO IBAH AOZPI, YHVH, BATAIVAH)
Take on the God form of Aroueris.
Hear Me:
AR ThIAF RhEIBET A-ThELE-BER-SET A BELAThA ABEU EBEU PhI-ThETA-SOE IB ThIAF
Hear Me, and make all Spirits subject unto Me: so that every Spirit of the firmament and of the Ether: upon the Earth and under the Earth: on dry Land in the Water: of Whirling Air, and of rushing Fire: and every Spell and Scourge of God may be obedient unto Me.
Circumabulate, once around and to the South:
Invoke Spirit Active (BITOM, AHIH) Fire (OIP TEAA PDOCE, ELOHIM, EDLPERNA)
Take on the God form of Horus.
I invoke Thee, the Terrible and Invisible God: Who dwellest in the Void Place of the Spirit:
AR-O-GO-GO-RU-ABRAO SOTOU MUDORIO PhALARThAO OOO AEPE, The Bornless One!
Hear Me, and make all Spirits subject unto Me: so that every Spirit of the firmament and of the Ether: upon the Earth and under the Earth: on dry Land in the Water: of Whirling Air, and of rushing Fire: and every Spell and Scourge of God may be obedient unto Me.
Circumambulate, once around and to the West:
Invoke Spirit Passive (HCOMA, Atoh Gibor Le-Olam Adonai) Water (MPH ARSL GAIOL, AL, RAAGIOSL)
Take on the God form of Isis.
Hear Me:
RU-ABRA-IAF MRIODOM BABALON-BAL-BIN-ABAFT ASAL-ON-AI APhEN-IAF I PhOTETh ABRASAX AEOOU ISChURE Mighty and Bornless One!
Hear Me, and make all Spirits subject unto Me: sot aht every Spirit of the firmament and of the Ether: upon the Earth and under the Earth: on dry Land in the Water: of Whirling Air, and of rushing Fire: and every Spell and Scourge of God may be obedient unto Me.
Circumambulate to the North:
Invoke Spirit Passive (NANTA, Atoh Gibor Le-Olam Adonai), Earth (MOR DIAL HCTGA, ADNI, ICZHHAL)
Take on the God form of Nephthys.
I Invoke Thee:
MA BARRAIO IOEL KOThA AThOR-e-BAL-O ABRAFT
Hear Me, and make all Spirits subject unto Me: so that every Spirit of the firmament and of the Ether: upon the Earth and under the Earth: on dry Land in the Water: of Whirling Air, and of rushing Fire: and every Spell and Scourge of God may be obedient unto Me.
Circumambulate to East of Altar:
Invoke Spirit (4 Spirit pents. in the order of the Tablet of Union, with names as before), followed by EHNB
In the names and letters of the mystical Tablet of Union, I invoke ye, ye Divine forces of the Spirit of Life!
Recite the Exhortation of the Portal (alt: the 1st Key):
OL SONUF VAORSAGI GOHO IADA BALTAH ELEXARPEH COMANANU TABITOM ZODAKARA EKA ZODAKARE OD ZODAMERANU ODO KIKLE QAA PIAP PIAMOEL OF VAON
Go by North to the North-East.
The visible sun is the dispenser of light to the earth. Let me therefore form a vortex in this chamber, that the invisible Sun of Spirit my shine herein from above.
Circumambulate 3 times, with 0=0 signs, as in Watchtower.
Return to the center, East of alter.
Take on the God form of Thoth
I Invoke Thee:
AFT ABAFT BAS-AUMGN ISAK SA-BA-FT IAO
This is the Lord of the Gods:
This is the Lord of the Universe:
This is he Whom the Winds fear.
This is he, who having made Voice by his Commandment, is Lord of All Things; King, Ruler and Helper.
Hear Me, and make all Spirits subject unto Me: so thaht every Spirit of the firmament and of the Ether: upon the Earth and under the Earth: on dry Land in the Water: of Whirling Air, and of rushing Fire: and every Spell and Scourge of God may be obedient unto Me.
Hear Me:
IEOU PUR IOU PUR IAFTh IAEO IOOU ABRASAX SABRIAM OO FF AD-ON-A-I EDE EDU ANGELOS TON ThEON ANLALA LAI GAIA AEPE DIATHARNA THORON
I am He! The Bornless Spirit! having sight in the feet: Strong, and the Immortal Fire!
I am He! I am Truth!
I am He! Who hate that evil should be wrought in the World!
I am He, that ligteneth and thundereth.
I am He, from whom is the Shower of the Life of Earth.
I am He, whose mouth ever flameth.
I am He, the Begetter and Manifester unto the Light.
I am He, the Grace of the World.
"The Heart Girt with Serpent" is My Name!
Come Thou forth, and follow Me: and make all Spirits subject unto Me: so that every Spirit of the firmament and of the Ether: upon the Earth and under the Earth: on dry Land in the Water: of Whirling Air, and of rushing Fire: and every Spell and Scourge of God may be obedient unto Me.
IAO. SABAO.