1. Make the Palestinians, Jordanian citizens and the West Bank part of Jordan.
2. Move all Palestinians from Gaza into the West Bank and make Gaza part of Israel.
3. Keep the border between Jordan and Israel a no-mans land to keep the Palestinians and Israels apart.
4. Make the oil rich countries of the middle east (Saudis, Iraqis, etc) give a portion of their receipts to Jordan to pay for their increased population.
So Let It Be Written, So Let It Be Done.
You can't make a country accept territory against their will and Jordan does not WANT the West Bank back.
It was nothing but trouble when they had it and would be nothing but more trouble now.
That is the elephant in the room that everyone persistently ignores. There is not one government that wants or even grudgingly accepts the so-called Palestinians. And unless you want a massacre you cant make them accept them. In Lebanon if you are of Palestinian decent you may not buy land and if you already own it you may not leave it to your heirs. They aren't wanted.