To unlock the Intro Movies for the other Ridge Racer games, as well as the Ridge Racers car artwork, you need to complete specific Tours as follows:

Ridge Racer 4 Intro Movie - Complete EX Tour 33
Ridge Racer 5 Intro Movie - Complete EX Tour 34
Ridge Racers 2004 E3 Demo Movie - Complete EX Tour 35
Rave Racer Arcade Intro Movie - Complete EX Tour 36
Machine Design Collection 1 - Complete EX Tour 37
Machine Design Collection 2 - Complete EX Tour 38
Machine Design Collection 3 - Complete EX Tour 39