MembershipUser.DeleteUser - Need your help

Hi Friends,
I actually dont want to use the default stored procedure which MembershipUser.DeleteUser (that is, "aspnet_Users_DeleteUser"). But I want to use a new stored procedure "sp_Users_DeleteUser" which I created for deleting user, because while user says s/he want to delete the user. It will actually be marked as "Inactive" in my system.  
So How can i change the stored procedure name for MembershipUser.DeleteUser, so that while calling this method it will invoke my custom stored proc. rather than default one.   
Pls suggest friends.
 
Thanks  
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