Just in case this is happening to you here is a list of the tracks, with the description of their sky style, and also the name of the files for each track (under your Sky directory.) You can swap the files at will (be sure to make backup copies first just in case you want to go back!)

1. Alps (orange sunset, blue fog, snow, bad transitions): ALPS.BIN, ALPS.FSH, ALPS.TXT
2. Autobahn (dark grey, rain, thunder and lightning): AUTOBAHN.BIN, AUTOBAHN.FSH, AUTOBAHN.TXT
3. Auvergne (yellow sunrise): CASTLE.BIN, CASTLE.FSH, CASTLE.TXT
4. Cote d'Azur (pink sunset): COASTAL.BIN, COASTAL.FSH, COASTAL.TXT
5. Corsica (blue sky, big white clouds): CANYON.BIN, CANYON.FSH, CANYON.TXT
6. Normandie (orange sunrise/sunset): FARMLAND.BIN, FARMLAND.FSH, FARMLAND.TXT
7. Pyrenees (blue/pink afternoon): FOOTHILLS.BIN, FOOTHILLS.FSH, FOOTHILLS.TXT
8. Schwarzwald (blue sky, sometimes fog, bad transitions): FOREST.BIN, FOREST.FSH, FOREST.TXT
9. Skid Pad (blue sky, light clouds): SKIDPAD.BIN, SKIDPAD.FSH, SKIDPAD.TXT
10. Zone Industrielle (orange clouds, thunder and lightning): INDUSTRIAL.BIN, INDUSTRIAL.FSH, INDUSTRIAL.TXT
11. Monte Carlo 1 (night): MONACO1.BIN, MONACO1.FSH, MONACO1.TXT
12. Monte Carlo 2 (night): MONACO2.BIN, MONACO2.FSH, MONACO2.TXT
13. Monte Carlo 3 (night): MONACO3.BIN, MONACO3.FSH, MONACO3.TXT
14. Monte Carlo 4 (night): MONACO4.BIN, MONACO4.FSH, MONACO4.TXT
15. Monte Carlo 5 (night): MONACO5.BIN, MONACO5.FSH, MONACO5.TXT