Can I use two payments on the same form?

One more question, I can use the "shopping assistant" with another extension of payment? Both running on the same form?

Do you mean to add two different payment tools on the same page? If so, please refer to the guide below that can help you with this.

http://www.jotform.com/help/120-How-to-set-up-paypal-along-with-other-payment-options

You may be also interested in this guide to update the multiple payment form.

http://www.jotform.com/help/161-How-to-Update-the-Multiple-Payment-Form

Hope this information helps! If you are referring to something different or need any further assistance, please let us know. We will be happy to assist.