Hello!

I found a thread about this, with solutions to edit the header.php, which is closed:
http://forum.bytesforall.com/showthread.php?t=18875

Going by the suggestions in that thread, I tried to edit the file, but now the file is almost empty:

________________________
<?php

global $montezuma;

echo bfa_parse_php( $montezuma['subtemplate-header'] );

________________________

I hope to replace the title of the site with a header image, and I hope someone can help me.

Thank you,
Llyane

You don't want to edit the actual, physical header.php file. Instead, you want to edit the virtual template files.

Go to Appearance > Montezuma Options > Sub Templates and read the information there. Once you've read the info, then click the header.php subtemplate and you will see the virtual header file there.