I have used a few programs over the years, Predator among them.
BUT....
The Best I have found is a program called Inplot.
Grab it from
www.i-logic.com and I think you will be impressed.
Every machinist I know that has used it has been impressed.
The demo's that they have it running when you first install the program will confuse you.
But it has excellent online help and has more switches and configurations than any program I know yet.
This is not only the best backplotter I have seen it's a full tool box of programming tools. I love the utilities and and different colors you can assign to codes. Makes the program really jump off the screen for you.
I have been using it for the last few years and have only scratched the surface of what this amazing program can do.
It's fairly cheap too.
I paid a grand for it a few years ago, Now you can have the full version for only $150. and a Site license for $400.
Works for Vertical and Horizontal Lathes and Mills and even Wire EDM machines. Plus you can make you own custom configurations and name them for whatever machine you need.
Grab a fully working 30 day version for free from the site above and give it a look see.
I think it will make your day.
Mohawk