Hi Martin. I am not one of the people who does the hands-on work on the sheet, but I'm pretty familiar with the sheet so I thought I'd respond.
No. Currently the sheet looks can only look to PC stat blocks for vehicular attacks. Its an issue that I am hoping will be resolved in future sheets...which makes things really complicated when you have minion groups. Unfortunately, right now, if you want to use the attack roll functionality in the vehicle's sheet, you also need to be running the NPC/pilots off of PC sheets.
No. Currently the sheet looks can only look to PC stat blocks for vehicular attacks. Its an issue that I am hoping will be resolved in future sheets...which makes things really complicated when you have minion groups. Unfortunately, right now, if you want to use the attack roll functionality in the vehicle's sheet, you also need to be running the NPC/pilots off of PC sheets.