When searching for this specific version, you will often find it packaged as a compressed .rar archive. The "exclusive" tag usually refers to specific community-made patches included in certain distributions, such as:

Includes native support for widescreen resolutions and XInput controllers .

To understand the significance of Beta 3.1, one must understand the technical audacity of the project. Unlike a simple "mod" that changes textures or adds cars, a total conversion requires dissecting the guts of one game and transplanting them into another. The primary tool for this endeavor was the engine of Grand Theft Auto: San Andreas . The modders essentially stripped the San Andreas map and replaced it with the Liberty City map from the PSP version.