478918 company database + google maps

I need a database integrated with google maps code generator. The database will contain names of companies, descriptions and addresses. I wish they (these companies) could be cataloged in the categories, subcategories and tags. How does the generator work? 1. In the administration panel I check (through checkboxes) records that I want to see on the map. 2. After acceptance, the google maps code is being generated and contains ONLY these companies that I have checked in the first step. I would also be able to select the entire category, subcategory and/or keyword, thus google map will display all the matching records eg. all the entries from given category + selected individual entries from other categories. In addition, I need to be able to mark the records with different "flags", which correspond to a particular icon on the map.