SEO hacking for Joomla 1.5.2

Joomla! is a wonderful open source CMS. But the performance of content on Search Engine Results is not good enough.
Some SEO (Search Engine Optimize) hacking should be taken to make it better on SERP.
The first one is H1 tag.
Joomla does not take H1 on it template. So the Search Engine can not find the important part of the page.
To add H1 on the page title, article title, you need to do following html hack.
Use whatever html editing tools you like, I use Dreamweaver now.
The template files are sitting here.
\website root\components\com-content\views\frontpage\tmpl\default_item.php
\website root\components\com-content\views\article\tmpl\default.php
\website root\components\com-content\views\category\tmpl\default.php
\website root\components\com-content\views\section\tmpl\default.php
Find “contentheading”
Then add <h1> </h1> around the heading tag.
Save them and upload them to site.
When you browse the page after H1 hacking, the title will looks bigger than before.
You can also use css to add H1 style for them.