xsl filters pipeline again...

Hello again!!! Thank u for answering  me so quickly!What i want to do with
these filters is:
1)the first filter should choose between the language(1 or 2) assuming that
this parameter is taken from a database after a query concerning what the
user wants. (never mind this for now...)So it should give me an xml output
which should look like this,assuming that the user speaks english:

<?xml version="1.0" encoding="ISO-8859-7"?>
<?xml-stylesheet type="text/xsl" href="023.xsl"?>
<SITES>
<CONTENT><!--English -->
<LAN>1</LAN>       <!-- 1.EN -->
<LEVEL>1</LEVEL>
<DISPLAY>1</DISPLAY> <!-- 1.SMS  2.WAP 3.WEB -->
<TITLE>Mars Hill</TITLE>
<TEXT>yess</TEXT>
<IMAGE></IMAGE>
</CONTENT>
<CONTENT>
<LAN>1</LAN>       <!-- 1.EN -->
<LEVEL>2</LEVEL>
<DISPLAY>1</DISPLAY> <!-- 1.SMS  2.WAP 3.WEB -->
<TITLE>Mars Hill</TITLE>
<TEXT>hello</TEXT>
<IMAGE></IMAGE>
</CONTENT>
<CONTENT>
<LAN>1</LAN>       <!-- 1.EN -->
<LEVEL>3</LEVEL>
<DISPLAY>1</DISPLAY> <!-- 1.SMS  2.WAP 3.WEB -->
<TITLE>Mars Hill</TITLE>
<TEXT>hola</TEXT>
<IMAGE></IMAGE>
</CONTENT>
</SITES>

2)the second one should do the same thing on this xml file and not the
original one but it should exclude two out of the three levels,e.g. level 1
and level 2, assuming that the user wants only level 3 info,so it should
give me an xml output like this:

<?xml version="1.0" encoding="ISO-8859-7"?>
<?xml-stylesheet type="text/xsl" href="023.xsl"?>
<SITES>
<CONTENT>
<LAN>1</LAN>       <!-- 1.EN -->
<LEVEL>3</LEVEL>
<DISPLAY>1</DISPLAY> <!-- 1.SMS  2.WAP 3.WEB -->
<TITLE>Mars Hill</TITLE>
<TEXT>hola</TEXT>
<IMAGE></IMAGE>
</CONTENT>
</SITES>

3)now the last filter should  choose between displays and it should give me
an html output showing an image if i have display=2 or a simple html text if
i have display=1. I havemanaged to show an image with an xsl stylesheet with
an html output. So the problem is how to combine these things.Should i have
only one xsl,using xsl:import for example...or should i have three different
xsl's???And where should i declare these?
I've tried this only for the first filter with ur help but it doesn't give
me anything :(((

<?xml version='1.0'?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/TR/WD-xsl">
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="4.0" encoding="UTF-8" indent="yes"/>
<xsl:template match="/">
<xsl:apply-templates/>
<xsl:for-each select="SITES/CONTENT">
<xsl:if match=".[LAN='1']">
<xsl:copy-of select="."/>
</xsl:if>
</xsl:for-each>
</xsl:template>
</xsl:stylesheet>
</xsl:stylesheet>

Thank you in advance and sorry for the huge question....I'm reaally stuck:(





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