Quote:
Create a gsx.cfg in the FSX\SimObjects\Airplanes\CS_B737-200 folder. Copy and paste this:

[aircraft]
nosegear = 9.14
refueling = 1

[exit1]
pos = -1.66 7.97 -0.52 5.60
code = 1
name = Main Passenger Door

[exit2]
pos = -1.43 -10.40 -0.51 -11.70
code = (L:PassDoor2,bool)
name = Aft Passenger Door

[exit3]
remove = 1

[exit4]
remove = 1

[service1]
pos = 1.56 8.21 -0.52 -7.10
code = (L:ServDoor1,bool)
name = Forward Service Door

[service2]
pos = 1.34 -10.44 -0.54 10.20
code = (L:ServDoor2,bool)
name = Aft Service Door

[cargo1]
pos = 0.84 4.41 -1.84 0.90
code = 3
name = Forward Cargo Door
uldcode = AUTO

[cargo2]
pos = 0.88 -6.67 -1.80 9.30
code = 4
name = Aft Cargo Door
uldcode = AUTO
 

and see if that works. That works for me, so it should for you too.

Quote:
There are no baggage loaders for the -200ADV, only for the -200C/F. The above code works for the -200ADV as well.

Here is the gsx.cfg code for the -200C:

[aircraft]
nosegear = 9.144
refueling = 1
absoluteheights = 0

[exit1]
pos = -1.65 7.9 -0.762 7.0
code = 1
name = Forward Passenger Door

[exit2]
pos = -1.38 -10.4 -0.15 -12.0
code = 1
name = Rear Passenger Door

[exit3]
remove = 1

[exit4]
remove = 1

[service1]
pos = 1.38 -10.25 -0.15 12.0
code = 0

[service2]
remove = 1

[cargo1]
pos = 1.524 3.972 -1.9 0.0
code = 3
name = Forward Cargo Door
uldcode = BELT

[cargo2]
pos = 1.158 -6.7 -1.44 0.0
code = 4
name = Rear Cargo Door
uldcode = BELT
 

and for the -200F:

[aircraft]
nosegear = 9.144
refueling = 1
absoluteheights = 0

[exit1]
pos = -1.65 7.9 -0.762 7.0
code = 1
name = Forward Passenger Door

[exit2]
remove = 1

[exit3]
remove = 1

[exit4]
remove = 1

[service1]
pos = 1.65 8.15 -0.762 -7.0
code = 0

[service2]
remove = 1

[cargo1]
pos = 1.524 3.972 -1.9 0.0
code = 3
name = Forward Cargo Door
uldcode = BELT

[cargo2]
pos = 1.158 -6.7 -1.44 0.0
code = 4
name = Rear Cargo Door
uldcode = BELT
  

Hope this helps.

Edited:

Open Windows Explorer and go to C:\Users\YourUserName\AppData\Roaming\Virtuali\Airplanes and look for the CS_B737-200 folder. If you find it, delete it (also delete or remove the gsx.cfg file from the FSX\SimObjects\Airplanes\CS_B737-200 folder). Start FSX, load the 737-200 and start GSx, see if it sets it up again properly. As far as I can remember, the location of the airstairs and cargo loader etc. are originally set by the [exits] entry in the aircraft.cfg. They are in the wrong place within the aircraft.cfg so they may need to be changed. I changed them in the aircraft.cfg myself, but it made no difference, so to get GSX working correctly, I had to edit the locations myself. It works fine for me now, but if I call the jetway, it stope in the centre of the plane (above the wings because it is reading the [exits] info in the aircraft.cfg).

You're welcome.