So what do I need to do? I went with this assumption that I could. This is off their website. What do I need to do to run my mill with Mach3 off this computer?
Laptop, 32 or 64-bit Desktop – External Motion Controller Only
An appropriate external motion controller (options can be found on the Plugins page)
Windows 2000, Windows XP, Windows Vista, Windows 7, or Windows 8
1Ghz CPU
512MB RAM
Video Card with 32MB RAM(Large G-code files, especially 3D files will require a video card with 512MB RAM or higher)