The jetways will of course attach to your airplane, provided you use a native FSX model or, at least an airplane ported from FS9, but with the door position in the aircraft.cfg file.
For AI planes to work, they also need to have the door position in their aircraft.cfg file. If the traffic package use models originally done for FS9, they'll surely miss that. You might try adding it yourself but, for a complete traffic package, it might be a long work.
Nothing we can fix from the scenery, anyway.
