Your mother should receive her green card in the mail automatically. It could take up to 6 or 9 months for the card to arrive. Also, any time she moves (until she becomes a US citizen), she has to submit Form AR-11, Change of Address Form within 10 days of moving. Failure to do so could be a ground of deportation.
Apart from that, there’s nothing else to do!
Attorney Edward Weiner
http://www.immigration-aux-usa.com/