You would need the 12 volt (or more) line from the powersupply. Most people run steppers at more than the rated voltage, and use current limiting resistors to limit the current. Read about steppers here:
http://209.41.165.153/stepper/Tutorials/Tutorials.htm
TurboCNC is much smoother than Kcam. Windows gets in the way and makes the output to the steppers rough. Turbo is only $20.00 USD. Version 4 will be out soon. It will include continuous contouring. I use version 3.1a and I have not had any trouble on my router.
As to your boss, I would suggest you build your PCB mill, and use what you learn to design a bigger machine. There are some plans out there for machines that are larger, but most are not setup for comercial aplications, as they are hobby machines. Probably too light for comercial work.
Eric