Wirelessly posted (BlackBerry: BlackBerry8530/5.0.0.1030 Profile/MIDP-2.1 Configuration/CLDC-1.1 VendorID/417)

You need to re-read my post.

If you want to redeem AC Aeroplan miles for UA flights, you cannot reserve the flights with United; you must call AC and have them reserve the flights, after you have first opened an AC Aeroplan account, and registered that account with Amex so that you will be able to instantaneously convert your MR points to Aeroplan miles while you are on the phone with the AC agent.

The fact that United charges 65,000 MileagePlus miles for this redemption is irrelevant in your case: you do not have MileagePlus miles to redeem. Whether Aeroplan charges 65,000 miles, 55,000 miles, or 75,000 miles for this redemption is something that you can determine on AC's website, or on the phone with the AC agent.