One thing about the Women's Health Project is that the problems associated with HRT are for estrogen + progesterone. The arm that studied women who'd had hysterectomies and were on estrogen only showed a reduction in breast cancer from the control group (of no HRT). I know this does not affect the OP, but it may have bearing for others reading this.

I have tried to do research about Bio-HRT over the years and honestly have not been able to come up with much other than testimonials. No controlled studies that I know of. (I would welcome any sources that others might have.) I have no idea if B-HRT is safer, because I can't find any information. This is not to say that it is less safe, just that it seems to difficult to know.

I wish this subject were given more attention. There are a lot of women out there who could benefit from more information.