Hi Thomas,
I'm from Singapore and found the scene files to be unusable too, but actually, there's a way to 'tweak' these scene files for the NTSC machines. What I actually did, was copy a scene file from my SDX900 and paste it on to my computer. The scene files are text based, so editing them isn't that tough.
The first three lines are the most important part to the scene file as they dictate what the camera reads. So simply, what you could do is this...
'NTSC' scene file:
Card Ver 1.01-00
AJ-SDX900
M Ver 0000.1
From there, edit the text file's first three lines to this.
'PAL' scene file:
Card Ver 1.00-00
AJ-SDX900/D908
M Ver 0000.1
I cannot gurantee if this works for you as my camera originates from Asia. What you do, in case my edited text file doesn't work, is to actually save a Scene file onto a SD card and check the file's first three lines. If they are actually different, then modify the DOWNLOADED 'NTSC' file's first three lines like the example I have given above with the scene file from YOUR SDX 900. I hope it wasn't too confusing :)
Regards,
Jac