I think you're in dangerous waters. If this is a path she wants to take, supporting her and recognizing that it will be difficult and probably painful for her is the best you can do. However, and please forgive me, it sounds like you are the one driving here. That this is something you want to do... you say you want to do it for her and that's admirable, but is it really something she wants to do, or is she doing it for you? Only she can answer that honestly.
Assuming that she is doing it for herself, even with the best intentions, you are almost certainly risking reopening wounds... and while healing those wounds is good, it probably won't be a fun, pleasurable experience for anyone at the start.
Honestly, I think you'd be much better served investing in a good therapist with experience dealing with traumatic events. After a good, professionally guided walk down this road, then she might be ready for the experience you are hoping for.
My $.02, take it for what it's worth.