There are a few easy ways to add the Like button to the Virtuemart pages and to automatically pull the correct image for the product. It depends on a few things though. Can you let us know exactly what version of JFBConnect, Virtuemart, and Joomla you are using? That will help us provide the best solution for your needs.
Also, please post from the account that you subscribed to JFBConnect from. Priority support is for active subscribers only.
Thanks,
Alex