XslCompiledTransform with XmlWriterSettings/XmlWriter outputs msxsl:script function name and namespaces

I am developing an XSLT to transform an xml document to an rtf document.  Within the XSLT is an msxsl:script function called GetImageString and is intended to produce a string that represents the given image file.  Using the XslCompiledTransform class I was able to output a text file as I wanted except that the BOM (byte order mark) was being placed at the top of the file.  I didn't want that so I found that I could use an XmlWriterSettings class to specify not to include the BOM.  This worked well, except now the output includes the name of the embedded script and a list of namespaces.  I do not want that and do not know why it is showing up.  Can anyone help me get around this problem?

Here is the XSL:

<?xml version="1.0" encoding="UTF-8"?><xsl:stylesheet version="1.0"
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    xmlns:xpp="http://www.sdl.com/xpp"
    xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main"
    xmlns:v="urn:schemas-microsoft-com:vml"
    xmlns:msxsl="urn:schemas-microsoft-com:xslt"
    xmlns:rend="urn:rend-scripts"><xsl:output method="text" encoding="utf-8"/><!--<xsl:variable name="fonts" select="document/styles/style[font='Times-Roman']"></xsl:variable> --><xsl:template match="xpp:document">          <xsl:text>{\rtf1\ansi {\fonttbl </xsl:text><xsl:apply-templates select="//xpp:style"/><xsl:text> }</xsl:text><xsl:apply-templates select ="//xpp:image"/><xsl:text>
};</xsl:text></xsl:template><msxsl:script language="c#" implements-prefix="rend"><msxsl:assembly href="C:\Projects\LearningRTF\System.IO.dll"/><msxsl:assembly href="C:\Projects\LearningRTF\System.Drawing.dll"/><msxsl:using namespace="System.IO"/><msxsl:using namespace="System.Drawing"/><![CDATA[
        public string GetImageString(string path_to_image){
          MemoryStream stream = new MemoryStream();
          Image img = Image.FromFile(path_to_image);
          img.Save(stream, System.Drawing.Imaging.ImageFormat.Tiff);
          byte[] bytes = stream.ToArray();
          string output = BitConverter.ToString(bytes, 0).Replace("-", string.Empty);
          return output;
        }
        ]]></msxsl:script><xsl:template match="xpp:image"><xsl:text>
{\pict</xsl:text><xsl:choose><xsl:when test="@type = 'jpg'"><xsl:text>\jpegblip</xsl:text></xsl:when><xsl:when test="@type = 'tif'"><xsl:text>\wmetafile8</xsl:text></xsl:when><xsl:when test="@type = 'gif'"><xsl:text>\pngblip</xsl:text></xsl:when><xsl:when test="@type = 'png'"><xsl:text>\pngblip</xsl:text></xsl:when><xsl:otherwise><xsl:text>No rtf image implementation for file type: </xsl:text><xsl:value-of select="@type"/>        </xsl:otherwise></xsl:choose><GetImageString><xsl:text> </xsl:text><xsl:value-of select="rend:GetImageString(@path)"/></GetImageString><xsl:text>}</xsl:text></xsl:template><xsl:template match="xpp:style"><xsl:value-of select="@name"/><xsl:apply-templates/></xsl:template><xsl:template match="xpp:style" name="GetStyles"><xsl:text></xsl:text><xsl:variable name="font" select="@font"></xsl:variable><xsl:text>{\f</xsl:text><xsl:value-of select="position()"/><xsl:choose><xsl:when test="$font='Times-Roman'"><xsl:text> Times New Roman;}</xsl:text></xsl:when><xsl:otherwise><xsl:text> </xsl:text><xsl:value-of select="$font"/><xsl:text>;}</xsl:text></xsl:otherwise></xsl:choose></xsl:template></xsl:stylesheet>

Here is the C# program to do the transformation:

public void TransformWithMS()
{
    XsltSettings xsltConfig = new XsltSettings(false,true);
    XslCompiledTransform xslt = new XslCompiledTransform();
    xslt.Load("scratch.xsl",xsltConfig,null);
    XmlWriterSettings xmlWriterSettings = new    XmlWriterSettings();
    xmlWriterSettings.Encoding = new UTF8Encoding(false);
    xmlWriterSettings.ConformanceLevel = ConformanceLevel.Auto;
    XmlWriter results = XmlWriter.Create("scratch.rtf", xmlWriterSettings);
    xslt.Transform("my.xml", results);
}

This is a snippet showing the offending output: