adding parameters to query string in Search.jsp

[Nathan Hale]

I am needing to make modifications in the query string.  The query string  
being passed to Search.jsp is generated by a search.asp which contains this 
code:

        <%
        sourceFile = "http://myserver:8080/search.jsp?"; & Request.QueryString
        set oXML = Server.CreateObject("Msxml2.SERVERXMLHTTP")
        oXML.open "GET", sourceFile
        oXML.send()
        Response.Write oXML.responseText
        %>
What I need to do is to insert a new scoping parameter into the query string 
- so that I can point nutch to any one of five different indexdb's,
So my query string might end up looking like:

http://www.mydomain.com/search.asp?query=xyz&myindexdb=1&start=0&hitsPerPage=10&hitsPerSite=0&clustering=
Can anyone show me where & how to add this additional parameter to the 
search.jsp query string?  Any help appreciated.

-Nathan