sponsership of orphans

[noora]

Hi Everybody!
has anybody sponsered an orphaned niece of nephew before, i need some info to how it did go and how long it did take. I already went through the ICI website but i still have some an answered questions, like what type of supporting documents need be provided by my niece, who could sign her application for PR since she is a minor, she is just 13 yo. if anybody has any info, could you please let me know, and many thanks in advance.