Ecart Single Product
I have a single product to sell - registration to access a web app - and want to use a standard PayPal 'Buy Now' Button, which I have already set up. However I need the payment success/failure features of eCart so that on successful payment I can automate sending registration verification for access to the app. Can I achieve this without using the rest of the eCart pages/process? It would be overkill for a single product and quite irritating for buyers, I should think. (I have set up eCart and checkout to see if I could work it out, and haven't managed to! )
Happy to pay for a premier appointment if that's the best way to go.