Technical Query : Standard Postscript command For Pulling Preprinted Marketing Insert

Hi Team,

We are Working with Inspire Desinger Tool to generate Postscript Files.there we need to Dynamically call for PrePrinted marketing inserts.where these Postscript files are send to Xerox Printer to get the orderForms Printed.
we are looking for the Postscript command or DSC standard Syntax that is recognized by Postscript Printers to issue a command to pull the marketing insert.
Could you please provide the correct Postscript syntax to get those Preprinted marketing inserts pulled from Printer through Postscript command