Create a payment option plugin for woocommerce (e-junkie)

Right, what we need is to integrate e-junkie ([login to view URL]) a payment gateway into woocommerce, I know that they are both e-commerce payment gateways, but we want the order once completed via e-junkie to show in our backend woocommerce orders. There are three options available for adding the payment code from e-junkie on the website; 1) Add the HTML checkout code to each product page - easiest option, but not our ideal one 2) Add the HTML payment code to the cart page – doable, but is our second option 3) Add the HTML payment code to the checkout page – probably impossible, but is our best option. If we can only do the first option, then there’s hardly anything to be done on your part as we can deal with this (may need some help depending on different factors) Please note: we currently accept Stripe, but this will also allow us to accept another form of payment. The main thing we need you to do is set up a URL to accept a script from e-junkie (a script can be sent once the payment is complete by the customer), so we need to take that script and turn it into an order on woocommerce and ideally create a customer account (password is currently sent out automatically after the order is made, so we can use the email from the order to create the account on our website and send out the password). Please see the link for information regarding the script: [login to view URL] I would advise opening an account with e-junkie and trying to add a product to see what I mean about sending the script to a URL (you only need an email and the account is free for 7 days, no payment info is needed to sign up). We also require this to be a plugin as we don’t want to edit the core code of woocommerce as when we update it will then wipe the changes made.