A) If you want to accept credit card payments via PayPal, you need to enable "Non-PayPal account" option in your payment settings to allow your buyers to checkout without having to create a PayPal account.

- Open shop in ShopFactory

- Click Central dropdown button (formerly known as "Properties" button)

- Select Payment methods accepted

- Ensure that the "Country" dropdown menu has "Show All" selected.

- Scroll down and tick "PayPal" checkbox and then click Next button.

- Enter your PayPal Email address.

- Enable "Non-PayPal Account" checkbox

Buyer does not need to create a PayPal account to checkout and landing page for Non-PayPal account.

- Select the currencies you want to accept - make sure the currencies you enable here match your shop currencies.

- Tick the payment methods you want to accept in PayPal, i.e. Visa, Mastercard, PayPal, etc.

- Click "Next"

- You can sort the order of display for all payment methods enabled by clicking the up/down arrow button. 

- Click Finish button to save the settings

-  Save and preview your shop.

-  Place a test order to ensure checkout is working

-  Publish your shop so that the changes are uploaded online.

B) How do I setup PayPal so that my customers do not have to signup for an account to make a payment?

Please refer to the related KB  article below,

http://support.shopfactory.com/kayako/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=602