<xsl:template match="text">
  HERE THE PROBLEM starts, because the 'customer' tags can
  occur everywhere within the 'text'-tag in xml.
  AND how can I get the text on the one hand and on the other hand
  the customer stuff in sequence order as they occur in the xml file?????
  </xsl:template>

That is the default behaviour for XSL, so you just want

<xsl:template match="text">
 <xsl;apply-templates/>
</xsl:template>

(or no template for text at all, as that is the default)

The character data in text will be copied to the output, and each 
customer element will be transformed by whatever you specify in

<xsl:template match="customer">...</xsl:template>
<xsl:template match="customerdata">...</xsl:template>

David


and 

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