325896 Login Bridge

I want users who purchase an email package or elearning programme on my Joomla site to be automatically registered with my email system ([login to view URL]) or with my elearning system ([login to view URL]). I use the nbill component for purhases and the links to the customers email and elearning accounts need to appear in the "My Account" pages when the user logs in. I will require confirmation of similar projects or complex joomla development that have been executed satisfactorily.