Was just wondering if anyone knows if it's possible to assign one of my CH Yoke buttons to action the A/P DISC on PMDG 744. Have tried going to Assigments in MFS, and Keyboard Assigments in the PMDG options but no joy??????

Yes, you should be able to assign one of your buttons on your CH yoke to the A/P DISCON function. I used this during beta. I assigned a key combination in the PMDG menu and then used a regstered FSUIPC to assign that combo to one of my buttons. Works flawlessly.Hope it helps,