
If skin has "Custom Image" option that is not showing in skin option, download the latest version of skin.
Other way is open CLASETRO.skin7 up in Resource Hacker. Go to line 285, and delete this sign ";" at the begining of line, 
then click on complile button, and save as some name.skin7 
The custom image option is for a greyscale(black and white picture),in alpha channel.
If a color rgb picture is used instead, it will look very color faded and washed out.







As Ivo made the pattern image tile, and repeat. One can do a screenshot of real repeating picture, using a small cropped portion of original image.
Just find a spot where the image repeats, and crop image at that point.
Then it will be seamless never ending on menu.

There are sites with free seamless images, and ones that cost money.

Luckily repeatable textures are everywhere in our lives. Such as Christmas wrapping paper, wallpaper, fabrics, art.

By making the alpha picture inverted(negative), 
and changing rgb channels to black, or white, one gets different looks. 

Feels like on Windows 98/95, with all the tile background textures. :)
