classinternalSource
@API(status = INTERNAL)
public final class JarModForgeInstaller

Installs Forge up to 1.5.1. Forge was a jar mod back then, its zip got copied into minecraft.jar (see LegacyForgeGameJar)
FML downloads a few libraries into <game directory>/lib on its first start, from a server that is gone already 1.5.x can be pointed at a mirror (fml.core.libraries.mirror), older versions can't

Methods

public static void install(LaunchConfiguration config)
Parameters
configLaunchConfiguration