Not all "DDT2000 databases of Renault vehicles" are created equal. The market is flooded with cheap eBay CDs and shady torrents containing corrupted files.
If you're looking to build on the DDT2000 database , which is a comprehensive collection of ECU files (XML format) for Renault, Dacia, and Nissan, you could introduce a Smart ECU Version Comparer & Automatic Mapper