Can she blow-dry it or straighten it? I have really curly hair too, naturally and I've found the best thing for me to do is sprinkle setting lotion over it then rough blow-dry it with my fingers into a kind of straight style.
There are a few pictures of my hair-style on my profile and to do that I used three heated rollers, one on each side and one on top of my head and then when they'd cooled, took them out and coaxed the curl back onto itself.
Curly hair is actually easier to do because the hair holds the shape better than straight hair.
Good luck
