All you need to do in order to have the qTranslate widget in your pages header is to add this code to header.php:
1. This will create a text-only widget.
<?php if ( function_exists( 'qtrans_generateLanguageSelectCode' ) ) qtrans_generateLanguageSelectCode( 'text' ) ?>
2. This will create an image (flag) only widget.
<?php if ( function_exists( 'qtrans_generateLanguageSelectCode' ) ) qtrans_generateLanguageSelectCode( 'image' ) ?>
3. This will create a text and image widget.
<?php if ( function_exists( 'qtrans_generateLanguageSelectCode' ) ) qtrans_generateLanguageSelectCode( 'both' ) ?>
4.This will create a dropdown widget(an HTML select element with all available languages).
<?php if ( function_exists( 'qtrans_generateLanguageSelectCode' ) ) qtrans_generateLanguageSelectCode( 'dropdown' ) ?>