Hello, here is the skybox i created for dod_flers_b1 (http://dayofdefeat.net/forums/showthread.php?t=76413).

http://pix.nofrag.com/a/9/6/c961b2ae6c0a5092dfb8f8800e4c3tt.jpg (http://pix.nofrag.com/a/9/6/c961b2ae6c0a5092dfb8f8800e4c3.html)
DOWNLOAD (http://grippy.free.fr/dl/snowy_day.zip)

INSTALLATION:

Extract the skybox folder into : Steam\SteamApps\Account_Name\day of defeat source\dod\materials

Thanks.