To add PayPal Buy Now buttons to your website, follow these instructions:

1. Create the button code using PayPal's Button Factory in your PayPal account
2. Add a Text/HTML asset to one of your pages
3. Switch the editor into HTML mode by pressing the Source button in the top row of the Text/HTML editor
4. Click your cursor at the spot where you want to place the button and paste in your code
5. Then modify the first line of the PayPal code like so:

<form action="https://www.paypal.com/cgi-bin/webscr" method="post">
to
<form action="https://www.paypal.com/cgi-bin/webscr" method="post" target="_blank">

If the PayPal button is not showing at the proper size, please follow the instructions here.