Add Customized Question and Answer to PasswordRecovery Control in ASP.Net

I am using password recovery control in forgotpassword.aspx page. By default the password recovery control validates the Login id and the security question of a particular user. But i want to give an alternate option. That is, If the user forgets the security answer he can give his PAN Number as identificaiton. Its should be an option like either he can provide security answer or his PAN number. Can we acheive this functionality. Because from my knowledge it looks like Security Answer is mandatory.  But i want to provide alternate option that user should give his security answer, if he forgets he can use PAN number for his identificaition. UpmMembershipProvider has default property (requiresQuestionAndAnswer) which is set as true. Any one can help me out?