We have a highly customized eCommerce website built on Joomla / Virtuemart platform. We use several price levels for many different shopper groups. We would like to add a function that would present "Call for Pricing" in place of a displayed price if a price for a product and specific shopper group is set at $0.00. This must not interfere with any of the existing customizations that are currently enabled and dependant on price levels / shopper groups.
In addition, we would like to add an area in our checkout page that would allow a registering guest to opt-in to our email database. We use a 3rd party firm and can provide an html form to insert into the page.
Please reply only if you are a GREAT English communicator, and have experience in this specific type of Joomla / Virtuemart customization.