At this point there isn't much that can be done.
If your friend is really interested in raising the fry they are going to have to set up a rearing tank --- a 5 gal will work --- and raise "rots" to feed the fry. Can try to catch the fry right when they hatch, but that could be difficult. Another way would be be slowly move a ceramic tile close to where they are laying the eggs, and getting them to lay on that. Then remove the tile -- with eggs -- to the rearing tank. Would need an air stone in the rearing tank to simulate the fanning that the parents do.
A really good place to start would be to pick up Joyce Wilkerson's book.