If you want the authentic experience, skip the search for a PS1 version and look for the to play on your favorite emulator.
The game's graphics were likely created using a combination of 3D modeling software and texture painting tools. The developers may have used software like Autodesk's 3D Studio or Alias Systems' PowerAnimator to create 3D models, which were then optimized for the PS1's hardware. cadillacs and dinosaurs ps1 rom