Question : Custom GPO to change a Multi-String value in an ADM

I am  attempting to create an adm group policy file that will allow me to set multiple home pages in IE7, the first main page is stored in a string variable in the reg called
"Software\Microsoft\Internet Explorer\Main\Start Page"
 in the user class the second pages are stored in a multi-string called
"Software\Microsoft\Internet Explorer\Main\Secondary Start Pages"
also in the user class. I am able to set the "Start Page" with no trouble and I can set a single page into the "Secondary Start Pages" key but I am unable to add multiple pages to this key. the problem as I see it is that if you only have one "Secondary Start Page" the key is a string value but if you input multiple "Secondary Start Pages" this value changes to a multi-string value which I cannot figure out how to input data into
Does anyone know how to insert items into a multi-string value in an adm file?

here is my adm file. as I said above this works but I can only input 1 secondary page and I would like to be able to input multiple secondary pages from the gpo
CLASS USER
      CATEGORY "Internet Explorer 7 Custom Start Pages"
            POLICY "Set Home Page"
                  KEYNAME "Software\Microsoft\Internet Explorer\Main"
                  PART "Home Page"
                        EDITTEXT      
                        VALUENAME "Start Page"
                        DEFAULT "http:\\intranet"
                  END PART
                  EXPLAIN "Sets the Home page for Internet Explorer"
            END POLICY
            
            POLICY "Set Secondary Pages"
                  KEYNAME "Software\Microsoft\Internet Explorer\Main"
                  PART "Secondary Pages"
                        EDITTEXT
                        VALUENAME "Secondary Start Pages"
                        DEFAULT "http:\\www.google.com"
                  END PART
                  EXPLAIN "Sets Secondary pages that open in tabs with a new instance of Internet Explorer"
            END POLICY
      END CATEGORY

Answer : Custom GPO to change a Multi-String value in an ADM

It extends the windows GPO editor and adds the "Computer Settings" and "User Settings" items below the normal "Administrative Templates", make sure that you have both the PolicyMaker Registry Extension Client and Policy Maker Registry Extenstion 2.x listed in Add/Remove programs.