(seeifwecankeepthisgamegoing) there's an old saying: To the victors belong the spoils. There's another old saying, Senator, Don't piss down my back and tell me it's raining.
You could append the old tool as a subtool, and try projecting with zadd/zsub off, and mrgb on. Or just select the old tool and work with that instead.
Ummm.... why? Honestly, it's cool to see someone put effort into the old game systems. There is still a huge following of people that play the old systems.