But my flirting with this GSX I saw on Utube tutorials has me very frustrated. Im following a really good tutorial at the moment, I move the plane to Munich because this is an evaluation only, i stop the engines, I changed the start of gsx to just F12 and F11 respectfully.
I can't see any reason why anyone would need to change the GSX keys to F11 and F12, especially considering they ARE (by default) reserved by FSX to control camera views. We configured to be CTRL+F12 and CTRL+Shift+F12 for a reason...
I also changed the assigment to open doors to "M" as suggested by tutorial, so M1 M2 M3 and so on.
This doesn't make any sense either, and the author of that tutorial doesn't seem to know FSX very well. The M key, by default, is used by FSX to control the Magnetos.
However, I cant save this new assignment at all, if i exit fsx or crash, it goes back to shift E is it?
Obviously because FSX wants to use the M key!
But, do you realize that this doesn't have ANYTHING to do with GSX ? You were supposed to know how to open doors BEFORE GSX, and installing it doesn't change anything.
Anyway, my main problems really are getting the catering doors to open
Again, this is a problem that doesn't have ANYTHING to do with GSX. Suppose you wanted to open the catering doors BEFORE adding GSX. Would this change anything ? If you didn't know it before, installing GSX won't change anything.
Of course, you are referring to a freeware airplane, so I cannot even tell you if those doors even EXISTS! They might just be "painted on" and not being animated, you cannot be *sure* of this. I really hope you don't expect that GSX would automagically convert static doors into working ones!
But of course, this is an assumption. On a default airplane, the catering doors are opened with SHIFT+E and then 3. On 3rd party airplane, nothing is certain.
WHICH IS WHY, GSX has an easy to use airplane configuration editor included, so you can TELL GSX, how each door is open on an any particular airplane which is not ALREADY supported. This is the updated list of internally-supported airplanes:
http://www.fsdreamteam.com/forum/index.php/topic,5481.0.htmlIf the model you want to use is not included in that list, you MUST create a configuration for it for the first time you use it, otherwise it won't work with GSX.
The van appears, but the man walks straight through the closed service door with his head poking out of the top of plane, 
That's because that door is not configured, so GSX doesn't know how you open it, so it's set to ignore it. Which is what it's supposed to be, if the door is "fake".
the lift of the van is to high??
Because you haven't configured the door.
i have tried all sorts of things to make exit3 work, but it dont, and I have beeps all the time asking me to open exit 3...
Because you haven't said to GSX how that doors will open. Assuming it CAN be opened. If it can't, you MUST tell GSX to ignore it. Again, using the included airplane configuration editor.
I can open baggage doors and main doors. I opened my aircraft configuration window from the drop down menu, the #1 fsx open main doors works fine
Main door always work.
but #2 sometimes hangs
This doesn't obviously have anything to do with GSX. If it worked like this before, using GSX or not won't make ANY difference. But, it's possible it's a result of the fact you changed to use the M key, so you are in conflict with FSX. Or, you simply are not getting the hang of the brief "pause" between the first key (which should be Shift+E anyway, not M) and the number.
Again, NOTHING that has anything to do with GSX. You are just asking how to open doors on a particular airplane that, for all we know, might simply have been modeled with a fake catering door. But again, you CAN tell GSX about this, by setting it to Ignore that door. Obviously, you WILL see the guy going through the airplane bulkhead, but at least GSX won't keep asking for the door, and will start the service.
but exit 3, nothing on earth will open those starboard service doors
Again: you are referring to a 3rd party freeware airplane. What makes you *sure* that door can be opened in the first place ?
and it usually ends with fsx crashing, then I lose my "M" saved assignment.
That's because you shouldn't have used M in the first place. Key conflicts might cause FSX to crash. Use the default Shift+E key.
I really dont want to pay out £25 for gsx, if third party British Airways planes are not going to usable with it obviously. I am not technically as profient as i was, so opening up complicated bits of code, to fix what seems to be a simple problem.
GSX works with ANY airplane, even those that don't exists yet. But if the airplane is not already supported internally (see the above list), you MUST create a configuration for it before being able to use it.
No "complicated bits of code", just use the supplied airplane configuration utility, that is entirely interactive and graphical. You only need to READ the manual, which clearly explains how to use it.
I dont know why i get two catering trucks that duplicate each other either
Because you haven't configured the airplane!