I'll try it...thank you.

Website URL: http://mydomainname.com

However, my shopping cart is in a folder. I prefer the index.html to be free, so that I can put up a sales message. They click, and go to the domainname/zencart

Should my domain name remain as above or should I direct it to the folder? Any clue?

Default page [?] : index.html

Therefore, is my defult page the index.html or should I redirect it to the index.php within the shopping cart?

Exclude URL Query Parameters: zenid

E-Commerce Website: Yes
Site Search [?] : Don't Track Site Search

I prefer to track searches. But it asks for parameters? Any help with that? no clue.

Also, what is a bounce rate?

You should post your answer within the google help section...it'll will surely bring the attention of many, I'm sure. No one else is answering these questions.