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Hi, I am afraid that unless both neighbours agree, you won't be able to change the route of their Right of way (ROW). This is because your neighbours have a legal right to use the existing driveway and you are not permitted to stop them from using it-if you do, they could take you to Court and the Court would order that you re-instate the existing driveway and allow your neighbours access over it.
As the ROW is over specific land, your kind offer of granting an alternative route would not legally stop you from being entitled to use the existing ROW. Sorry this is not the answer you were looking for.. If I have answered your question, I would be grateful if you could rate my answer.
Kind Regards Al