Shane,
Most likely you can change to a different controller. I have seen some that are proprietory though. What model is your Precix? It looks like the signmaker? Is it using Steppers or servos? What type of connector is used from the controller to the machine. These can give a clue as to the type of communication formats used. By using floppies for data transfer do you mean that you load the Gcode to the controller with floppies, and then run the code or does it run the code from the floppy? If the latter is true then it may be harder to convert as this may require a type of Terminal connection using zmodem or xmoden or someother terminal emulation. Older machines that used tape drives and floppies usually have some similar setup and have to be drip fed the code so to speak using a serial connection. These types usually are not supported by Mach3 or EMC2 as they use parallel ports vs com ports and require more pinouts.
I'm not trying to shoot you in the foot, just want more info as this might be very easy or not.
edited to add: Okay I just read the controller specs on there website. They use serial or ethernet communications. This could be a drawback. Not sure without more study?
More study, I have found that some of the Precix use a knock off of the Automated Direct servos 750watt as well as a smooth stepper breakout board. The Servos would be fine but MAch3 does have issues with the smooth stepper board at this current time. I'm not sure about EMC2 and the SS boards?
Mike