I'm not sure how to go about it... but ti would involve at least three things...
First would be installing the gender hack (I know nothing about it, personally) so that user profiles indicate gender.
Then, you would need to hack the default title ladder to have two sets of titles... male and female.
I have no idea how to do this.
Then you'd need to edit some other files where the usertitle is set (I know ../admin/user.php is one of them) to check the users gender and then assign an appropriate title based on it.
I wouldn't know how to do this either.
I can figure out the algorithms, but don't know PHP to code anything.
*shrug*
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