5. It can certainly be useful if the parties have a religious objection to divorce ( which can sometimes happen ) or if the parties are
thinking in terms of a trial separation.. Sometimes a Separation Agreement can be easily used as the basis for a Consent Order on a subsequent divorce. But if you're thinking of do-it-yourselfing,
your agreement may not be enforceable.
6. As Shakespeare said, let me not to the marriage of true minds admit impediment. I'm not by any means opposed to two sensible adults making an agreement. I don't know, you may be able to find something on the internet ; but it must be enforceable to be of any use.