The v1.1 executable can sometimes be incompatible with certain modern widescreen fixes or high-definition remaster mods.
The patch upgrades the main executable ( gta3.exe ) to address several critical launch and gameplay issues: File: Grand.Theft.Auto.III.v1.1.zip ...
Are you planning to this patch for a classic playthrough, or Patch Info - Grand Theft Auto 3 - Rockstar Support The v1