You can't, that's the OP's very point!
But I've also discovered that it doesn't appear to work with PUP either unless you have auto-door opening enabled, which was a slight disappointment. I've given up with the fully auto-opening driver's door because sooner or later it catches you out and the potential consequences are simply not worth the utility. I had a couple of very close calls when the door popped open just a little earlier than I was expecting on approach in a tight situation. I thought using the key fob to trigger the door opening might be a good compromise, but seems it's all or nothing. Oh well, having to actually press the door button is a serious first world issue, lol!