Homebrew PCBs

To all that know.
I am new to this. When I found this forum, the long forgotten desire 
to make my boards with an old plotter came back to me.
I have a Zeta plotter. Also marked on the plotter is: Nicolet Z-887
It is a plotter where the paper is rolling back and foreword over a 
fixed roll. The 8 pens are situated in a rack that moves left and 
right along the roll. I can move everything with the controls on the 
plotter, the motors and motherboard seems to be ok.  

1, where do I find a program to get this plotter to work with my 
computer?

2, if it works, can I use this to make my print boards by engraving 
or other mean of removing the unnecessary copper?

3, Ho would I proceed?

Thanks
Satchid