Oh they're really white, didn't spot it earlier
If I were you, I'd take a look if modifying this dds file (for eg. into red) actually changes the situation.
If it does, it would mean it's the way how you can do it.
Although as far as I know,
MASS1L1A has done some work about it. Here (maybe) helpful posts:
http://www.subsim.com/radioroom/show...&postcount=418
http://www.subsim.com/radioroom/show...&postcount=424
http://www.subsim.com/radioroom/show...&postcount=435
Regards,
Michael.