Copy minecraft/versions/1.6.2 to minecraft/versions/1.6.2-patched
    Copy other LWJGL to minecraft/libraries/org/lwjgl/lwjgl/ and/or minecraft/libraries/com/paulscode/
    Edit minecraft/versions/1.6.2-patched/1.6.2-patched.json to point at the changed libraries
    Start launcher
    Create a new profile, select the new version