In MENUDATA\PARTDB and GAMEDATA\COMMON, there's a file named DRIVERS.DDB. (Not the DirectX DRIVERS.DDB, haha.) I experimented with it some time ago, and have it mostly figured out. Here's a snippet of Rocket Racer's entry, with added comments:      k_27    // Driver     "RR"     {         k_33    // ID? Does it need this?         0         k_29    // Driver GDB         "rrpelvis"         k_28    // Driver MDB         "rrpelvis"         k_2A    // Driver TDB         "rrpelvis"         k_