The Midtown Madness Archive (http://www.mmarchive.com/) is a collaberative user project dedicated to preserving the, literally, thousands of addons and custom vehicles created for the cult-classic games Midtown Madness and Midtown Madness 2. Visitors can upload files from their Midtown Madness collection, and file authors can share their files with the rest of world without worry of abuse or misuse.
The Midtown Madness Archive was founded on October 11, 2006 in an effort to bring all the collective Midtown Madness files are still out there. Though it still has a significant following, the websites hosting addons for the series are quickly dying out. The Midtown Madness Archive hopes to serve all your MM needs in the future!