Any questions ? (bout .dds)

That file is just an imagen with an alpha channel. You need an editor that allows you to edit ita, and save it as DXT5 dds.

White = visible.
Black = transparent, therefor not visible.

oh ... Thank you very much ! Now it seems easier

one more question : How can I edit the brake markers ? Those who are hanging of a steel pole or at least what is the file (lol)

do you mean that file ???

RALY_Arrows.dds

It's in data\dds

hm... Yeah i meant the file and thanks