No idea what you're trying to do here or if you're even on the proper issue list or repository. Can you explain more what this is about?

I'm trying to insert scripts before <./ HEAD>, i attach the printscreen with the example:
https://f.cloud.github.com/assets/2979740/480950/3d3e104a-b842-11e2-8a81-4c268c73b459.png
Just for testing, tag appear on the site but

As far as I can tell this isn't related to the issue tracker we're developing here. I think you need to look at the CMS to work on your issue. See this repository: github.com/Joomla/Joomla-cms