Provisional ranking graphics

i want to edit the provisional ranking graphics that appear in race, i just want to edit the background, because it is transparent now, i want it in a fixed color, or at least with less transparency.

i have edited:
gui/ingame/classement_provisoire_top.tga
gui/ingame/classement_provisoire_fond.tga

but it has no effect ingame, can anyone help?

here's a picture of what i need:
http://imageshack.us/f/69/pcmd.jpg/

what file controls the background of that information?