I try with the following code in viewtopic_body.tpl:
<!-- BEGIN switch_user_logged_out -->
<!-- END switch_user_logged_out -->
But this code does not run in the sponsor(view topic banner) or inside a post.
Ps for Mighty Gorgon: I beg your pardon because in other post I dont see your answerds due to my email acount was not the good, and I had not answerds notice... , but now i change my email acount.