Prawn does not write postscript, it writes PDF.  Though possibly similar in appearance, two different beasts, for sure.<p>And actually, we have support for reading arbitrary PDF on edge, expect a release in a few weeks :)<p><a href="http://github.com/yob/prawn/tree/templates_2010" rel="nofollow">http://github.com/yob/prawn/tree/templates_2010</a>