Hi we have this website: www.hygienics.com

I want to keep the look for the most part if possible but replace the backend Admin and the shopping system with AbanteCart Cart.

#1 Can I keep the theme/look and adapt it to AbanteCart?

Hello. Yes, but you need to develop new template (or change existing) for AbanteCart

#2 I installed the cart to /store directory so not to interfere with what is live now. When I finish can I move what I did in /store out into the root (public_html) part of the site and still have it work?

I have not touched .htaccess but will edit it if needed.

Yes you can please read this topic How to move to another directory and this How to move to another domain

Hello.

This is not possible.

Hi everyone,

I am new to AbanteCart and I am concerned about customer account creation spamming. By default, new customers registration do not require to enter any catpcha or some sort of anti spam mechanism and I was wondering if it's possible to include any sort anti account creation spam?

Hello.
There is no in admin setting to manage this yet. If you are good in php modify this files

Also, how do I make new customer accounts a need to click on a link to activate their account in the automatic generated email sent to them upon new account creation?

There is setting Approve New Customers in Admin-System-Settings-Checkout Tab

Hi.

Try to search for text 'Add to cart' in admin ( top right corner ) See video how it works

Hello.

Banner manager manage banner creation and edit process only.
You need to assign banner to the block -> block to the some Layout (template). Then assign different templates to each store. In this case you can manage each template layout (and store layout) separately in Admin-Design-Layout.

 If you want to use same template try to clone it

No its in template2. Basically if I set it 100% the slideshow wont reach on larger screens so I wanted to set the width then have the storefront float central on the screen

Hello. For template2 find extensions\template2\storefront\view\template2\stylesheet\stylesheet.css file about line 50
change
#wrapper {
text-align:center;
}
to 
#wrapper {
text-align:center;
margin: 0 auto;
}

Hello.

Can you please clarify what you are tried to do? It is not clear from your post.

In case you need export import  try other formats (CSV, TXT)

Also do not post file content. Please attach file to the topic.