[xsl] CSS and XSLT, again

Hello!

I have a problem with linking css file with xsl file during 
transformation. I cannot reference the css file since the final
transfored xml to be sent by email and style must be embedded into
transformed html file. I tried to use <xsl:include>, but I permanently
fail to have style sheet attached to the resulting transformed file.
Any ideas on how to accomplish this?
<link> will not work because, as I said, I cannot send css file, but
only final transformed html.

Thanks for any idea,

Shimon

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