All you need to do is edit your aircraft.cfg. Look for the section titled "exits". It should be towards the bottom of the cfg. You will see something like this;
[exits]
number_of_exits = 4
[glow=yellow,2,300]exit_rate.0 = 0.10 ;Percent per second
exit_rate.1 = 0.08 ;Percent per second
exit_rate.2 = 0.10 ;Percent per second[/glow]
exit_rate.3 = 0.08 ;Percent per second
What you do is simply remove the first 3 entries highlighted above. And in place of them, add this;
exit.0 = 0.4, 72.1, -7.0, 8.00,0 //openclose rate percent per second, longitudinal, lateral, vertical positions from datum (feet), type (0=Main 1=Cargo 2=Emergency)
exit.1 = 0.4, 40.5, -7.0, 8.00, 1 //openclose rate percent per second, longitudinal, lateral, vertical positions from datum (feet), type (0=Main 1=Cargo 2=Emergency)
exit.2 = 0.4, -42.30, 9.0, -7, 2 //openclose rate percent per second, longitudinal, lateral, vertical positions from datum (feet), type (0=Main 1=Cargo 2=Emergency)
So now the "exit" section should look like this;
[exits]
number_of_exits = 4
exit.0 = 0.4, 72.1, -7.0, 8.00,0 //openclose rate percent per second, longitudinal, lateral, vertical positions from datum (feet), type (0=Main 1=Cargo 2=Emergency)
exit.1 = 0.4, 40.5, -7.0, 8.00, 1 //openclose rate percent per second, longitudinal, lateral, vertical positions from datum (feet), type (0=Main 1=Cargo 2=Emergency)
exit.2 = 0.4, -42.30, 9.0, -7, 2 //openclose rate percent per second, longitudinal, lateral, vertical positions from datum (feet), type (0=Main 1=Cargo 2=Emergency)
exit_rate.3 = 0.08 ;Percent per second
Save the cfg and thats it. The default jetway should now attach to the 1st door on the aircraft. I've only tried this on the 777-200ER, but the others shouldnt be very different, if at all.
It will look like this.
