Making Custom Tilesets

I forgot how to make a custom tileset and I can't find the thread that says how to make a tileset. Help me. I even did multiple searches for it.

1) Draw in image editing program. You can use default tileset 0 as a template
2) Save to "...Knytt Stories\Worlds\Your world folder\Tileset#.png" # denotes which tileset number it will be.

k thanks