Program to edit aircraft files

I remeber when I used to mess with FS9 there was some sorta program from Microsoft's site that would open up aircraft files and it was easier to use and had an interface, I found it easier than notepad and you could easily edit gauges and make clones of planes.
Is there such a program for FSX.. or somebody know of the FS9 variant so I can try it with FSX? Cause I need to try to put digital gauges in my Cessna..
I think the FS9 one came with a SDK, you put it in your install folder, think it was called aircraftconfig?
Is there such a program for FSX.. or somebody know of the FS9 variant so I can try it with FSX? Cause I need to try to put digital gauges in my Cessna..
I think the FS9 one came with a SDK, you put it in your install folder, think it was called aircraftconfig?