>Is it possible to change the error message
>
>A record already exists with some or all of this information. Please reenter.
>
>I would like to make it more informative like what is conflicting, for eg. The Name and City already exists. Please reenter.

Is it possible for you to add a hook in your error handler to verify for that specific error number? If yes, then, once it, you will be able to show whatever message you want.