How do you cure transvestism?

You can't. None of the 'reparative' therapies that have been tried with homosexuals and transgendered persons has worked - in the end all the 'victims of the disease' went back to living gay or crossdressing or being bi or ....

Sadly this question belies bigotry in the back of it - "crossdressing is evil!" If you are a Hassidic Jew, then you have the talmud and your Rabbi to help you, otherwise you are either non-Christian or living under the new Law, 'to those that are holy, all is holy.'

A crossdresser may choose to not wear women's clothes for a long time, but the draw to dress is always there and most CDs fall back to dressing in 1 to 3 years (of course after a 'purge.')

Here's another way of looking at it. You can't "cure" crossdressing because it is not a disease. It is a state of being in one's mind. It would be like curing brown eyes.