Need help for setting up maps for worldwide church directory

I want to change my online worldwide church directories from a MS Access Database/html format to a Joomla format using your My Maps software. I have thousands of church addresses listed in my directories. Can your software handle a Microsoft Access Database migration? Do you have any technical support for this? I may need someone to help me with this. What do you recommend. You may see my directories at http://www.church-of-christ.org/churches. I can be reached at sg2_711@hotmail.com or by telephone at 208-878-4800.