Snahs Christmas Pressent to the Reloaded Clan.
Extract the "groundsand_blend.vmt" file to:

C:\Program Files\Valve\Steam\SteamApps\<yourusername>\counter-strike source\cstrike\materials\de_dust

and the "ct_urban.vtf" file to:

C:\Program Files\Valve\Steam\SteamApps\<yourusername>\counter-strike source\cstrike\materials\models\player\ct_urban

Ho ho ho, Merry Christmas :D