[OS X TeX] Invoking latex with tex + ghostscript option?

[Robert Morelli]

I'm trying to compile LaTeX files using pstricks.

As I know, pstricks is not compatible with pdflatex.
I use MacTeX-2008, which defaults to pdflatex, so I'm encasing all the
pstricks code in pdftricks, which is supposed to restore compatibility.

Now, pdftricks uses shell-escape to compile automatically generated
LaTeX files of the pstricks graphics. Unfortunately, when latex is
invoked on these, it's just using pdflatex as always, which doesn't
work.

I need to invoke the "ordinary" latex on the generated files, not
pdflatex.

I was told that I need to invoke latex with the "tex + ghostscript"
option. How do I do that?

Also, is there a way to arrange it so the latex command used on
the files pdftricks generates has that option?