If you have your dealers and distributors address data by city / zip code (instead of long/lat values), you can use iMapBuilder to import these addresses as points on a custom Google Map.
Please signup a free a/c at
http://www.imapbuilder.net/login/Details about import addresses from EXCEL or CSV file can be found at:
Import addresses from EXCEL file Import addresses from CSV file:For the popup message -- you can input HTML tags with your content. This way you can input plain text, as well as multiple links for each popup box.
Regards,
iMapBuilder Support