ComicPress Child Theme’s
Blank Child theme for ComicPress 4.0+
Download this child theme to your local computer. On your website go to wp-admin -> Appearance -> Themes -> Install [tab] -> Upload [link], then browse for the file and click upload. Activate it. It will then start using the child theme.
You can then ftp into your child theme and add images, modify the functions.php / style.css in there add navigation images etc.
When the main theme updates, it will not overwrite what’s in the child theme so your customizations will still be good.