DiRT Rally Game texture "maps"

[wr41th]

Hello everyone

well starting spend alot of time on this site, its becoming my new home...
Anyway does anyone know the saving of the in game texture of the land.
i have tried dds but i think i have used the wrong setting to save it,

i modded wales, which i covered the none shadow places in a dusting layer of frost and very light cover of snow, also added dirty gravel snow to roads..

but i can not see it in game, so the dds is in the wrong save setting,
so does any one know the right format to save the texture ?