Leafless cymbidium backbulbs

[nancy]

Greetings -
I've been given a cluster of 5 large, leafless, rootless backbulbs of Cym. Jungfrau 'Dos Pueblos.'
There are small (about 1" long) green growths, also without roots, coming out of two of these.
Soooooo, I've grown and divided cymbidiums, and given away these ripened backbulbs, but have never actually tried growing them myself.
Should I pot up now, or wait for roots? Then, wet or dry, sun or shade, etc.?
After googling this plant, it is certainly a beauty, and I'd surely like to grow it. Well! FWIW, I'm in the deep south, and we are in the midst of a hellish heat wave/drought.
Thanks - Nancy