> > 1. Make a printer filter text into postscript, but leave postscript alone.
> 
> This is not possible without resorting to human help; PostScript _is_
> text (at least until you get into Level 2 binary encoding and such,
> which I assume is not what you're talking about).  Indeed, I have on
> occasion wanted to print _exactly the same file_ twice, once as text
> and once interpreted as a PostScript program.

I think that PostScript files must begin with %!PS-, otherwise they are
treated as text.

> > 2. Disable banners.

Isn't it :nb: (no burst) or something like that?  man printcap.