the spinning babies website would be the best. tell her to try and kneel on the edge of a couch and have elbows on the floor in front, like shes upside down, it will encourage the baby to turn the other way and also help it if its in the pelvis already. It is really really really uncomfortable and can make you quite light headed, so much sure she has someone with her. I was doing this to try and turn DS2 into an anterior postion from complete posterior. The other was she can do it is to lie on her back on a board (ironing board may work) that is propped up on a bed or couch with her feet at the top. In other words anything that tips her upside down may work. It is all explained in the spinning babies website. Sit leaning forward at all times, no slouching. Chiropractor may be able to help also.
HTH