How to make a sky for Viper Racing:
In your paint program import an image of a background and make it tileable ( the very far left of the image,maybe 100 pixels,is a mirror image of the 100 pixels on the far right ).That's another tutorial in itself.
The size you must end up with to export the jpg format image to your "jpg2tga2tex" folder is 1024 x 256 pixels with no reduction in quality ( in saving options in your paint program you want the lowest setting for compression like 0 or 1 and also set it for "standard encoding" not progressive ) .
After exporting it run the jpg2sky.exe,click the "make sky" button.
Close the exe and double click the .bat file to convert the sky tgas to "tex" format.
Copy and paste the 4 tex format sky files into your mkresfiles folder.
Done for the sky part!