Is there like a...DVD I need to play for them? A handbook?

Just was thinking of getting some as permanent residents in the 5ft flight cage (with my Bourke and Splendid), just in case a baby zebra gets chucked out of the nest multiple times, or god forbid the parents get sick or something.
Do societies foster babies at any age, or do they need to hatch under them? So many questions, I really would like to thank you all in advance.
(I have been reading this page: http://www.birdsnways.com/articles/spenser1.htm Would y'all say its pretty spot on?)