Well just make sure the tutorials are very good and the templates work (test them by actually making a tileset with them and compiling it). You may also want to include some palettes (the original JJ2 palette, as well as a textured background example).

And for the tutorials, no one paragraph stuff. You should explain it in great detail and have lots of pictures/screenshots and examples. I would recommend making it in Microsoft Word. And then when you are done, get someone else to read over it and make sure they can understand it and they would be able to make a tileset with it.

For the level tutorial, I don't know...Maybe make it more of a JCS tutorial. Because I know that sometimes your levels aren't the best...