No luck using your code verbatim, but I want to make sure I understand what the new def is doing.  The "pop" command is essentially ignoring the topmost item in the stack, yes?  So essentially your redefinition is simply saying ignore showpage whenever it occurs in the code (at least until the original def of showpage is restored).  Is this correct?

If so, then this is essentially the same as removing showpage altogether from the code, and that hasn't worked in the past.  While I definitely do not want a new page generated, I definitely need the logo to print.

The result was the certificate without the logo.  Here's the logo image code (less the actual image information):

Yes, there is a showpage command after the logo image information.

I've tweaked the code via the scale and translate commands such that he logo appears in the lower right corner of the printed page.

%!PS-Adobe-3.0

%%Creator: cairo 1.8.8 (http://cairographics.org)

%%CreationDate: Fri Sep 09 14:07:37 2011

%%Pages: 1

%%BoundingBox: 0 0 183 90

%%DocumentData: Clean7Bit

%%LanguageLevel: 2

%%EndComments

%%BeginProlog

/languagelevel where

{ pop languagelevel } { 1 } ifelse

2 lt { /Helvetica findfont 12 scalefont setfont 50 500 moveto

  (This print job requires a PostScript Language Level 2 printer.) show

  showpage quit } if

/q { gsave } bind def

/Q { grestore } bind def

/cm { 6 array astore concat } bind def

/w { setlinewidth } bind def

/J { setlinecap } bind def

/j { setlinejoin } bind def

/M { setmiterlimit } bind def

/d { setdash } bind def

/m { moveto } bind def

/l { lineto } bind def

/c { curveto } bind def

/h { closepath } bind def

/re { exch dup neg 3 1 roll 5 3 roll moveto 0 rlineto

      0 exch rlineto 0 rlineto closepath } bind def

/S { stroke } bind def

/f { fill } bind def

/f* { eofill } bind def

/B { fill stroke } bind def

/B* { eofill stroke } bind def

/n { newpath } bind def

/W { clip } bind def

/W* { eoclip } bind def

/BT { } bind def

/ET { } bind def

/pdfmark where { pop globaldict /?pdfmark /exec load put }

    { globaldict begin /?pdfmark /pop load def /pdfmark

    /cleartomark load def end } ifelse

/BDC { mark 3 1 roll /BDC pdfmark } bind def

/EMC { mark /EMC pdfmark } bind def

/cairo_store_point { /cairo_point_y exch def /cairo_point_x exch def } def

/Tj { show currentpoint cairo_store_point } bind def

/TJ {

  {

    dup

    type /stringtype eq

    { show } { -0.001 mul 0 cairo_font_matrix dtransform rmoveto } ifelse

  } forall

  currentpoint cairo_store_point

} bind def

/cairo_selectfont { cairo_font_matrix aload pop pop pop 0 0 6 array astore

    cairo_font exch selectfont cairo_point_x cairo_point_y moveto } bind def

/Tf { pop /cairo_font exch def /cairo_font_matrix where

      { pop cairo_selectfont } if } bind def

/Td { matrix translate cairo_font_matrix matrix concatmatrix dup

      /cairo_font_matrix exch def dup 4 get exch 5 get cairo_store_point

      /cairo_font where { pop cairo_selectfont } if } bind def

/Tm { 2 copy 8 2 roll 6 array astore /cairo_font_matrix exch def

      cairo_store_point /cairo_font where { pop cairo_selectfont } if } bind def

/g { setgray } bind def

/rg { setrgbcolor } bind def

/d1 { setcachedevice } bind def

440 50 translate

0.4 0.4 scale

%%EndProlog

%%Page: 1 1

%%BeginPageSetup

%%PageBoundingBox: 0 0 183 90

%%EndPageSetup

q

Q q

-187.645 439.654 m 424.355 439.654 l 424.355 -352.346 l -187.645

-352.346 l -187.645 439.654 l h

-187.645 439.654 m W n

q 0 0 183 90 rectclip

[ 1 0 0 1 0 -0.252296 ] concat

  q

  0 0 183 90 rectclip

Q q

0.941176 0.301961 0.262745 rg

.

<image info removed>

.

  Q

Q

Q q

Q

showpage

%%Trailer

%%EOF

I inserted the code tweak verbatim, but the logo continues to print on a separate page from the certificate.  However, the logo itself now has a sun ray pattern eminating from the lower left-hand corner of the logo, the logo has changed color to red, and the bounding box clips off a portion of the logo itself.

Note that I not only included the defines you provided (those command lines after your %%comments), but also the changed coordinate values (boxed in by the Q and q's) as you posted them.  If I do not include those coordinate changes, the logo still prints out on a separate page with the sun ray pattern, but the logo color remains intact and the bounding box does not cut off the logo.

If you have any other suggestions, I'm all ears.

(and thanks for your help so far)

- Bry

Mr Horton - If you're still lurking, let me know.  I'd like to get the code to you for a look, if you don't mind.  This has been a major hurtle, and it really shouldn't be.

Thanks.

I'll send you a private message shortly. 

As an aside, I've taken a new route to try and get this logo to print.  I've now converted the .ps logo to a .pdf and am trying to integrate it that way.  If you just happen to have experience with that, let me know.  It might allow us to bypass wading through code...

Well, I resolved the issue - albeit not in the way the thread title suggests.

A review of ImageMagick showed that there is a command called composite which takes two input images and merges them into one.  This solved the problem for me.