Gleb,
Think of templates in the most simple way as possible. It is a basic HTML page (whether with tables, css, or both). It really is just that. You might even want to fill the page with some filler text (lorem ipsum).
Then, to run it off of MODx, just insert [*content*] where your main body is.
Let’s say your header and footer is always the same. Then you can create two "chunks", through the admin, named header and footer.
- Then replace your HTML header with the chunk "header".
- And replace your HTML footer with your "footer" chunk.
You can then replace your menu with the [[DropMenu]] snippet.
For another template example, check out Doze’s conversion of mollio here:
http://modxcms.com/forums/index.php/topic,3450.msg36265.html#msg36265.
It really is very easy. Just a plain HTML page. Then you replace the HTML content with your placeholders/snippets/chunks you make.
Chuck