Print to .ps artboard size

Question

I have been searching around about this for a week now. I want to print to Post Script. I want to have the post script file that is printed be the same size as the artboard. I am assuming this means that I can't use a print preset because the print size is hard coded into the preset.
I tried modifying Muppet Mark's code from this post Re: Script: print to PostScript but it seems the
opts.printPreset = 'PostScript';
creates a 8.5X11 page every time.
I've been in the Scripting Reference and P.165 has a printing example, but it just goes to the most recent printer because it's not defined.
I've seen a lot of conversations that say "Don't define the printer, just use a print preset". The group of files I'll be working with will have wildly varying page sizes. At any rate, I have a bit of non-working code that I have been pounding away at but I don't know what it is that I don't know. I've tried to define everything that isn't a default.
Does not work
#target illustrator
var idoc = app.activeDocument;
function print2folder(){
  var options = new PrintOptions();
  options.printerName = 'Adobe PostScript File';
  options.PPDName = "PPIT 2.2a";
  var sepOptions = new PrintColorSeparationOptions();
  options.colorSeparationOptions = sepOptions;
  sepOptions.convertSpotColors = false;
  sepOptions.overPrintBlack = false;
  sepOptions.colorSeparationMode = PrintColorSeparationMode.HOSTBASEDSEPARATION;
  options.jobOptions = jobOpts;
  var jobOpts = new PrintJobOptions();
  var name = idoc.name;
  var fol = Folder( "/Volumes/PPITX_Hotfolders/Art/Art_No_Trap" );//location on my server I want file to go
  var psName = name.replace( /.eps$/, '.ps' );
  var psPath = fol + '/' + psName;
  jobOpts.file = new File( psPath );
  jobOpts.name = psName;
  jobOpts.PrintArea = PrintingBounds.ARTBOARDBOUNDS;
  idoc.print( options );
print2folder();
Does not work
I'm getting: Error 1238: Required value is missing
Is there an example of a JavaScript that prints to post script by defining the printer and ppd anywhere? Is there a keyword I should be searching for? I've looked at everything that says "PrintOptions" in this forum. I'm missing something.
P.S. What is with the "improvements"? I couldn't edit my code after I pasted it in, it deleted some of the tabbing that I had in for clarity, and it inserted two returns where there is one.
Thanks for your time.

Answer 1

I was distracted by another project but I've got a new failed attempt to show off. You're welcome.
Again, I have started with the sample script from page 175. This time I was really excited about PrintOptions.PrintPaperOptions. I used the example script on page 179 to model my paperOptions from. I have evaluated the size of the artboard and used that info to define the width and height of the paper. I've added in some code to pull the name of the .eps file and use it for the file name of the post script. The "+ 0.0" on the height and width is because the value type of the property says "number (double)" and the default is "0.0" so I thought it might have to show a decimal place. It's probably useless. I get the same result with or without it. I don't understand what "number (double)" means, or how it's different from "number".
var docRef = app.activeDocument;
// Print with job options
var printJobOptions= new PrintJobOptions();
var paperOpts = new PrintPaperOptions;
var options = new PrintOptions();
options.jobOptions = printJobOptions;
options.paperOptions = paperOpts;
// Evaluate size of first artboard and store as variables
var boardWidth = docRef.artboards[0].artboardRect[2];
var boardHeight = Math.abs( docRef.artboards[0].artboardRect[3] );
printJobOptions.designation = PrintArtworkDesignation.VISIBLEPRINTABLELAYERS;
PrintJobOptions.printArea = PrintingBounds.ARTBOARDBOUNDS;
var fileName = docRef.name;
var psName = fileName.replace( /.eps$/, '.ps' );
var docPath = new File("/Volumes/PPITX_Hotfolders/Art/Art_No_Trap/" + psName);
printJobOptions.file = docPath;
paperOpts.name = "Custom";
paperOpts.width = boardWidth + 0.0;
paperOpts.height = boardHeight + 0.0;
docRef.print(options);
This is still giving me an 8.5X11