jQuery Grid Plugin - jqGrid

I've been trying for two days to get a simple example of an xmlstring based jqGrid working.. it displays the headers and a border but no content.. here's the code I've trimmed down to..

var facetString = "<?xml version='1.0' encoding='UTF-8'?>\\
<cluster id='CL-1'>\\
    <name>Bubba</name>\\
    <shortName>Bub</shortName>\\
    <facets>\\
        <facet macro='0' micro='0' id='F-0'>\\
            <studentFeedback>You got it.</studentFeedback>\\
            <description>He gets it, sorta</description>\\
        </facet>\\
    </facets>\\
</cluster>";
           
            $("#facet-table").jqGrid({
                datatype : "xmlstring",
                datastr : facetString,
                xmlReader : {
                    root : "facets",
                    row : "facet"
                },
                multiselect : true,
                multiboxonly : true,
                autowidth : true,
                colNames : ["Code", "Description"],
                colModel : [
                    {name : "code", index : "code", align: "center", sortable: false, width : 50, resizable: false, xmlmap: "[macro]"},
                    {name : "description", sortable: false, width : 900}
                ],
                imgpath : "javascript/third-party/jquery-ui-custom/css/south-street/images",
                viewrecords : true,
                caption: "<strong>Facets</strong>"
            });

I have about 18 other questions, but I figured once I got the basic going.. (for instance what config fields are required?, How do you make a column the concatenation of two attributes? IE macro+micro.. Is it ok to not have a pager?, etc..)

Descsuit