G92 is a command for the mill controller. Normally people will generate the g-code. Then in a text, or g-code editor copy the parts g-code, then insert the g92 between the parts. Here is an example. Easy to get lost, so good idea to run a simulation if you have the software to do that.
You probably can also do the cut, and paste in the Millmaster software. Then you would need to generate the tool path for each part in the Millmaster software. I don't use your software. In mine I would just use the same settings, and just select the different geometry. Or I can select all the geometry in one operation. It will move the tool to the clearance height, and move to the next geometry.