Google Maps Site Integration

We currently have a tourism based website located in Canada that provides a detailed list of all the restaurants, hotels, and attractions in our area. Each business listed on our site has a private profile all powered via PHP/MySQL, we are looking to include a map from google with their location pinned on it to give our users a better idea of its location. We have approx. 400 businesses listed, and the database is scheduled to be built tomorrow, we have a script we will be using to add all the businesses and their photos to their respective profiles. If needed, the winning bidder can add a geocode section to this script to automatically geocode the address inputted and add that to the database. The entire site is custom PHP and does not include a CMS, all scripts are custom and content as well. The timeframe for this project to be completed is a maximum of 36 hours, (24 or less preferred)