1) Download thematic (as the parent theme)
2) Create a child theme folder for the new site, and activate it using wordpress admin screen
3) Choose the basic layout you need, by modifying this line:
@import url(‘../thematic/library/layouts/2c-r-fixed.css’);
You can also create your own layout at this point if you feel like it. Same with typography or other things.
4) You can also modify the default main css to your site by creating a local copy on your child theme:
@import url(‘newstyles.css’);
5) Modify the templates and functions from the parent directory directly at the child’s folder, that way
you can always update the parent theme without affecting the child
Correction: 20/11 newest wordpress theme is set to be HTML5 already. Use that instead.