I\'m aware that similar questions have been answered here before:
A similar approach to KenS's would be to put the "composition" code in a single file and call the component files with the run
operator. It amounts to the same thing but with a little less shell-work. A limitation is that the -dSAFER option (which is ON by default in most Distiller installations) disables the run
operator.
combo.ps:
/Oldshowpage /showpage load def
/showpage {} def
gsave
(tmp-Front.ps) run
grestore
%additional scaling and translation to place the graphic?
(logo.ps) run
Oldshowpage