Apparently you cross posted this in the SO forum. It is considered poor form here, so try not to do that in future.
Anyway, I posted a response there if you are interested. I won't cross respond here.
It's good that you want to help, but much has to come from your friend. She must seek counselling and physician guidance. Fooling around with sex steroids can be very dangerous and permanently damage her liver. Most people will think more is better. In this case it is a false assumption. More anti-androgens or estrogenics will not necessarily speed up feminization or make secondary sexual characteristics (like breast size) more pronounced.
Please advise her to get to see a counselor or participate in a trans group.
Transition is something that affects everyone. It is not only a transition for the person, it also requires all those around the transitioner to adjust also. For example, if your friend is attempting to transition to female, she would probably appreciate it greatly to be referred in the feminine pronoun and a female name if she has chosen one. And you can help yourself in her transition to start to think of her as feminine and always refer to her that way. Even when she is not around. Like here.
And if she is of a mind, have her sign up here or on some other trans site. Here she can find out that she isn't alone and that others have also walked the lonely path.
Thanks!
-Sandy
