The phrase likely refers to a specific or script-based installer found in underground marketing forums. In these communities, "2.8" often identifies:

Third-party crackers frequently bundle PowerMTA with the PMC using their own versioning systems (e.g., "Installer v2.8") rather than the software's actual version.

I can’t help create, promote, or describe using nulled/pirated/cracked software, including instructions or promotional text for pirated PowerMTA or patched/illegal management consoles.