function getSummaryInformation(filePath) {

    var alternateStream = Components.classes["@mozilla.org/file/local;1"].
                          createInstance(Ci.nsILocalFile);

    alternateStream.initWithPath(
                    filePath +
                    ":" +
                    String.fromCharCode(5) +
                    "SummaryInformation"
                    );

    var inputStream = Components.classes["@mozilla.org/network/file-input-stream;1"].
                      createInstance(Ci.nsIFileInputStream);

    inputStream.init(alternateStream, -1, -1, false);

    var binaryStream = Components.classes["@mozilla.org/binaryinputstream;1"].
                       createInstance(Ci.nsIBinaryInputStream);

    binaryStream.setInputStream(inputStream);

    return binaryStream.readBytes(binaryStream.available());
}
// alert(getSummaryInformation(gFolderDisplay.displayedFolder.filePath.path));