I believe that you're limited to 25 lines of code without a license, which is probably your problem.
For a cabinet shop, you don't want to be using LazyCAM. You want a CAM program that can automate the creation of g-code. The cheapest option that can do that is Vectric's V-Carve Pro.
It has a feature called Toolpath Templates. They allow you to assign machining operations to the layers of the .dxf file. What this does, is allow you to import the .dxf, and save the g-code for a nested sheet of parts in under 30 seconds.
I've been programming big industrial CNC's in high volume cabinet shops for 15 years. You want the process to be as automated as possible. This translates into much less time spent programming, and far fewer mistakes.