Thanks guys. That cookbook website looks like just what I need.

So Deskproto has a list of machines in it's 'library' of which mine isn't one. The manual says to choose 'ISO G code in mm' as default if your machine isn't in the library. I'm hoping that this will allow Deskproto to 'post-process' the code so that my machine understands it. What do you reckon? Worth a try or am I missing a step?