Newbie help needed BAD!!!

Hi everyone. Man I need help bad...I want to write an xsl that will
basically copy an xml tree, but allow me to chnage the values of certain
nodes. For example:

<highlevel>Highest Level
<innernode>This is an innernode
<lownode>This is a low-level node</lownode>
</innernode>
</highlevel>

I want to copy this, but change the text of <innernode>, such as 

<highlevel>Highest Level
<innernode>I have edited this text
<lownode>This is a low-level node</lownode>
</innernode>
</highlevel>

This seems so trivial, but...I tried :

<xsl:template match="/">
	<xsl:copy-of select="."/>
</xsl:template>
<xsl:template match="innernode">
	<innernode>
	I have edited this node
	</innernode>
</xsl:template>
but it never applies the innernode template

Any help appreciated!!!!!!!

-MC


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