Right so for anyone who doesnt know, ive just found out that gsx have a beta for marketplace airports basically an api that was released with su10 which means now gsx can read marketplace airports! Tried and tested on a few downloaded from flightsim.to and the profiles work brilliantly! All you have to do is go into fsdt installer go to config for gsx and click on the use su10 beta api checkbox and thats it!