If you're looking for information on how to install a specific version of this game, especially one described as a "20 gun version," here are some general steps and considerations:

In this modified version:

  1. The Golden Cadillac: Normally, the car is standard. In this version, the Cadillac has a gold paint job and fires explosive rounds instead of standard bullets during the chase scenes.
  2. Dinosaur Mounts: You can now ride the smaller dinosaurs (like the Allosaurus) for the entire level, not just 10 seconds. The dinosaur also shoots fireballs.
  3. 20 Weapons defined: You have access to Pistol, Machine Gun, Shotgun, Laser, Flame Thrower, Grenade, Dynamite, Axe (melee), Bone (throwable), Oil Slick, Tire Iron, Rocket Launcher, Tesla Coil, Acid Vial, Poison Dart, Boomerang, Crossbow, Ice Beam, Sonic Blast, and the secret "Hannah's Fist" (a one-hit kill punch).
  4. Unlimited continues: No need to insert coins. Press Start + Select to add 20 credits instantly.

Because it’s a fan mod, no commercial license exists — but downloading it for free from random sites is high-risk (malware, fake installers, cryptocurrency miners).