Magento Product Based Transactional Mail UPDATED

I need an extension that will allow me to send different email concepts according to the product purchased. The category can decide which email template should be send. Order mails, invoice mails and shipping mails. I use magenta 1.6.1.0 Plus a downloadable product feature will be build. With this feature admin can add downloadable products onto every users 'my downloadable products section'. As if user has ordered the item. And I will get help with 3-4 minor issues about my store. Such as 'disappeared add to cart button on the iPhone theme.' fix.