styling issue with the child theme

Hi,

I tried to use the child theme but the styling got messed up with two rows of main menus showing up. Followed the instructions at http://codex.wordpress.org/Child_Themes and added

”
/* =Imports styles from the parent theme
————————————————————– */
@import url(‘../enfold/style.css’);

/* =Theme customization starts here
————————————————————– */
”

to the enfold Child theme style.css file.

Did I do it correctly?

Also, if I added codes to the header.php file, does it mean that I need to copy header.php file to the child theme directory? does the same rule apply to all the files that were modified?

Last question, now we have everything installed by default under the enfold directory, can we rename the folder to abc? would that change collapse the site? Once renamed, would I still be able to get automatic update from themefrost with the correct API key entered?

Thank you for your help!