Node type in Chameleon

Hello.

How to make a custom layout for a node type in Chameleon theme for 4.5? Say I want to avoide displaying of teasr or something like that. You may check: www.kaem.ru/spo which is filestore actually.

Previously I used something like this:
function chameleon_node_file($node, $main = 0, $page = 0)

But now it does not wor somehow. What's wrong?