: Use the emulator settings to map the "Coin" and "Start" buttons to the PSP's Select and Start buttons.
Open the emulator configuration menu (usually by pressing the Home/Select button) and check the frameskip settings. Turn on "VSync" and set video scaling to "Fit Screen."
Before installing the file, ensure your console meets these minimal homebrew requirements:
If using an (like a pre-compiled OpenBOR EBOOT), place it in the ISO folder in the root directory of your memory stick.
This usually means you are missing the cache file on a PSP-1000, or your arcade ROM version does not match the emulator's required set. Ensure you use a standard MAME-compatible CPS1 ROM.
Safely eject the device from your computer and exit USB mode on the PSP.
Cadillacs and Dinosaurs is technically "abandonware"—a game that's no longer being sold or supported by its copyright holder, and hasn't been for decades. It's trapped in a legal gray area because the rights are tangled between Capcom and other parties.