transform with xsl:&lt;img src="http://localhost"/&gt; to <fo:external

[volod]

Hello,
unfortunatly I'm not good at xsl transformations.
I need to transfrom with xsl text that is in xml.
In xml there are html images like that: &lt;img src="http://localhost"/&gt;
how can I convert it in xsl to: <fo:external-grahic src="http://localhost"/>

There is one note: this image tag is placed inside text that shouldn't be affected.

I don't know is that important or not: I do transformation with Java's javax.xsl.transform.Transformer

Thanks a lot.
Vladimir.