Editing "built in" custom fields

Hi.

I am attempting to customize the Dating Theme for a particular purpose (adult service providers), and need to affect several of the “built in” custom fields. For example, “dagender” contains 4 options: male, female, couple and group. While editing the language allows me to change the language of the existing options output to the profiles, the custom search still shows the original language in the drop down options. I would also like to add a 5th option (male, female, couple, pre op, and post op).

Any suggestions on how to do this? I have tried creating new custom fields but there doesn’t seem to be a way of replacing some of the “built in” ones on profiles and search results etc without removing them all. There are so many features that make this the ideal theme for this project, but I am starting to think that it might be easier to use the Directory Theme and recreate some of the features from the Dating Theme instead.

@Mark: Is it possible to have the ability to add/edit/remove the “built-ins” via the theme admin?