I have used Doug Dawson's XML_Sound3.gau gauge quite successfully in my own panels, in 2D for FS9. I was able to have APU sounds with start and stops, looping for APU, airconditioners, all sorts of different click sounds, even airbus hudraulic sound, really great. When I load the same plane, with my custom panel in FSX it crashes because of the XML_Sound3 file. I renamed it .dll, to no avail. Without the XML_Sound3 file, the plane is loaded with no problem at all. And flies as usual. At the various forums I get conflicting info whether or not this file can be used in FSX. Someone seemed to have received a file from Doug himself, but that was back in 2007. I know that Doug Dawson no longer adds sound files for downloads, his V3 said it was the final one. I would really like to fly my customized planes (DC6 and B707) in FSX. What to do??