I made this change a long time ago, which I no longer remembered how it decompiled. It worked as follows. I extracted the spb2xml.exe file to the C: disk, opened CMD.exe and put this command line:
C: \ spb2xml.exe C: \ Users \ YOUR_USER \ AppData \ Roaming \ Microsoft \ FSX \ LWcfg.SPB c: \ LWcfg.xml
The conversion only worked when I put the path to LWcfg.spb in its original folder. The XML file resulting from this conversion will be on disk C:
Now with the converted file, make a backup of the original LWcfg.spb in another folder, and replace it in the folder C: \ Users \ Eduardo \ AppData \ Roaming \ Microsoft \ FSX \ with LWcfg.xml. FSX will now use the XML file instead of SPB, and you can make any changes you want. If you have a friend with Prepar3D v3 (assuming it works from v4 too), you can ask him to send you the file LWcfg.xml (which P3D uses), which also works well to replace it (that's what I'm using in my FSX-SE). The only difference is that the P3D XML is more detailed with the name of the objects that make up Freeway traffic.
Editions in LWCFG work for regions defined by Microsoft. I attached an image to detail this. To change the desired region, search for it in the XML.
<RegionID> A </RegionID>
I created several new highway and airport vehicles, with the typical appearance of vehicles in my country (Brazil) and made the changes.
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