A video and slideshow of the funeral cortege from Santa Maria del Priorato to the neighboring church of Santa Sabina (presumably the "great Roman church" specified by Noonan, though the previous Grand Master's requiem occurred in 1988 at Santi Apostoli) is available through Gloria.tv.
Details of the mass at the Santa Sabina, can be found here, along with Cardinal Laghi's homily. The story also notes the actual state funeral, with numerous dignitaries in attendance, will occur March 8 at St. Paul's-Outside-the-Walls.
This photograph, shows the coffin after it was moved to Santa Sabina, with the Paschal candle and the four embroidered skulls at the corners of the black ground-cloth visible.
Further details of this mass, excerpted from Noonan, and coverage of the state funeral on March 8, will occupy future postings.
Other information and commentary from knowledgeable readers is always appreciated.