How do I appoint the executor of a will.

So I take it that you are preparing Wills for yourselves, correct?  That's an excellent idea.  Over half of Americans do not have a Will.  You can name any competent adult to serve as the personal representaive of your estate.  I typiclaly do not suggest having "co-exectors".  There are too many practical problems when you have more than one chef in a kitchen.  Please retain an estate planning attorney to help you with your Wills.  There are many traps for the inexperienced.