Paypal Integration of website, including testing.

I need Paypal to be fully integrated into my website so online payments can be processed smoothly. Project must be completed within 48 hours. I have two options available to me, but I am not sure which payment option is best suited to my website, or which one can, or should be integrated using the WooCommerce plugin. 1) Paypal digital goods. 2) Paypal standard. I have an existing Paypal business account ready to be integrated with. I have attempted the API integration but it is beyond my abilities. I have attached 2 documents, created by WooThemes of your reference. My website has been designed in Wordpress, using a WooThemes theme, and the WooCommerce plugin. Your job is to ensure that payments can be processed smoothly and the money goes into my business Paypal account, and the product can then be downloaded by the customer, once the payment has been accepted. You are required to test the payment gateway until you can ensure that payments are secure, smooth and functioning perfectly. I currently have 5 digital products available, you would be required to test the purchase and download process of all 5 products to ensure they are all working. You must choose the most appropriate method of payment, between Paypal Standard and Payment Digital Goods. Products are all digital products and clients should be able to be download the product once payment has been confirmed. Most of my clients will be paying in AUD $ (Australian Dollar), but we will also get some international buyers, so they Paypal gateway must be appropriate for my clientele. It is important that I can trust the employee of this project 100%.