With this CLEO mod, you can use the HESOYAM cheat as in San Andreas. Enter HESOYAM while playing the game and the script will fix your car, add armor and health, and give you $250,000.
Demonstration:
Instructions for installing the mod: Copy the file "hesoyamscript.cs" and paste it into the CLEO folder in the GTA VC directory (Where you installed gta vc, for example: C:/Program Files(x86)/Grand Theft Auto Vice City/CLEO).
If you find any bugs, please comment on it in the comments.