Yes but the gauges most likely won't work properly.
I have been successful with many FS9/2004 aircraft in FSX by changing a call in the .cfg and/or substituting sound files. It's not a by the book modification, and it does require permission from the creator before the modified versions can be uploaded. 🙂
could you post how to do it ?
I'm working on a "How2", but can hardly keep up with the "updates". At the moment I am back in FS2002 working on a Cessna 195 conversion to FSX. You will need some programming knowledge to know where and what to change in the .cfg files. I find it easier with some to convert from FS2002 to FS2004 and then to FSX.