There are various herbs to help--I had luck boosting my supply form almost nil with my 2nd using a combo of fenugreek, alfalfa and blessed thistle with lots of nursing.
She should rent a hospital grade pump like a Medela Lactina or similar and pump every 2 hours round the clock and also try and nurse tha baby as much as she can. She can also get a SNS 9nursing supplementer) and that will help--she can put formula in it so when the baby nurses she is getting fed and also stimulating the breast, KWIM? it involves taping a tube to her breast 9tiny tube) and when I used one a loooooooong time ago there was a syringe-looking thing that the formula or expressed breast milk was in.
I hope this helps, I have to run, I'm making food. BTW, I researched relactating with my dd, I too had no support and we failed though I pumped for about 8 weeks for her. This is mostly what I read in brief.
*eta--check out this link:
http://www.kellymom.com/bf/supply/relactation.html