I have an update on this for anyone who reads this thread before the end of September.

I've succesfull managed to transfer AMEX points to multiple family members even though the transfer process seems to want my own name as the onepass holder name.

Just one small prblem left now and that is that on all accounts I get the message
"! The address on your Mileage Plus and OnePass accounts do not match. You can update your address online www.united.com or www.continental.com. If your accounts match but you are still seeing this message, please call Mileage Plus Customer Service at 800-421-4655 (10am - 5:30pm CT) or OnePass Customer Service at 800-554-5522 (6:30am - 8:00pm CT, Mon-Fri)."

Can anyone help with that?

Cheers
Richard.