Current code will look something like this ...

            factory.printing.header = "&D";
            factory.printing.footer = "";
            factory.printing.Print(false);
        

Or may be something like this ...

For example (free/basic usage):

<!-- MeadCo ScriptX -->
<object id="factory" style="display:none"
  classid="clsid:1663ed61-23eb-11d2-b92f-008048fdd814"
  codebase="http://[your path here]/smsx.cab#Version=8,0,0,56">
</object>
<script src="/scripts/jquery-3.1.1.min.js" type="text/javascript"></script>
<script src="/scripts/meadco-scriptx-1.10.1.js" type="text/javascript"></script>
<script type="text/javascript">
  $(window).on('load', function () {
     if (MeadCo.ScriptX.Init()) {
       MeadCo.ScriptX.Printing.header = 
          "MeadCo's ScriptX&b:&p of &P:&bBasic Printing Sample";
       MeadCo.ScriptX.Printing.footer = 
          "The de facto standard for advanced web-based printing";
       MeadCo.ScriptX.Printing.orientation = "landscape";
       $("#btnprint").click(function() { 
            MeadCo.ScriptX.PrintPage(false);
       });
     }      
   });
</script>

To make the old code work with MeadCos' Script.Print and bring controlled print output to any browser just requires a few javascript files are added along with the details on how to connect to the server:

            <!-- no add-on -->
            <!-- latest version of library -->
            <script src="/scripts/jquery-3.1.1.min.js"></script>
            <script src="/scripts/meadco-scriptx-1.10.1.js"></script>
            <!-- Add ScriptX.Print libraries -->
            <script src="/scripts/meadco.scriptX/meadco-scriptx-core-1.11.1.js"></script>
            <script src="/scripts/meadco.scriptX/meadco-scriptx-print-1.11.1.js"></script>
            <script src="/scripts/meadco.scriptX/meadco-scriptx-printhtml-1.11.1.js"></script>
            <script data-meadco-printhtmlserver="htp://scriptx.print.meadroid.net" 
                    data-meadco-subscription="xxx-xxx-xxxxxxx-xxx" 
                    src="/scripts/meadco.scriptx/meadco-scriptxfactory-1.11.1.js"></script>
            <!-- code as it was before 'just works' -->
            <script type="text/javascript">
               $(window).on('load', function () {
                 if (MeadCo.ScriptX.Init()) {
                   MeadCo.ScriptX.Printing.header = 
                      "MeadCo's ScriptX&b:&p of &P:&bBasic Printing Sample";
                   MeadCo.ScriptX.Printing.footer = 
                      "The de facto standard for advanced web-based printing";
                   MeadCo.ScriptX.Printing.orientation = "landscape";
                   $("#btnprint").click(function() { 
                        MeadCo.ScriptX.PrintPage(false);
                   });
                 }      
               });
            </script>
        

Or, this works too ..

            <!-- no add-on -->
            <script src="/scripts/jquery-3.1.1.min.js"></script>
 
            <!-- Add ScriptX.Print libraries -->
            <script src="/scripts/meadco.scriptX/meadco-scriptx-core-1.11.1.js"></script>
            <script src="/scripts/meadco.scriptX/meadco-scriptx-print-1.11.1.js"></script>
            <script src="/scripts/meadco.scriptX/meadco-scriptx-printhtml-1.11.1.js"></script>
            <script data-meadco-printhtmlserver="htp://scriptx.print.meadroid.net" 
                    data-meadco-subscription="xxx-xxx-xxxxxxx-xxx" 
                    src="/scripts/meadco.scriptx/meadco-scriptxfactory-1.11.1.js"></script>
            <script type="text/javascript">
            $(window).on('load', function () {
                   $("#btnprint").click(function() { 
                    factory.printing.header = "MeadCo's ScriptX.Print &b:&p of &P:&bCompatibility Sample";
                    factory.printing.footer = "The de facto standard for advanced web-based printing";
                    factory.printing.portrait = false;
                    factory.printing.Print(false);
                   });
                 }      
               });
            </script>