Checkout without Registration / Login

Hello,

I’ve a question which is very urgent due to the user experience on my page.

Currently I have to disable the Guest checkout. The guest checkout is very important for me, because I would lose many customers if they have to register.

On my checkout page the customer has to fill out the following mandatory fields:
Name and Lastname
Country
Street
Zip Code
City
mail address

With these information a customer can be created at mangopay. So finally my question is: How can i manage it, that customers do not have to register before they buy?

I’m looking forward to your solution.

Best regards,
Marc

The page I need help with: [log in to see the link]