XSLT 1.0 Help for Multi part Message (BizTalk) - xslt

Question

Having a requirement where i have aggregated message and populate and loop for each message in output , below is what i have but need help where to start with.
Input Message :
<ns0:Root xmlns:ns0="http://schemas.microsoft.com/BizTalk/2003/aggschema">
<InputMessagePart_0>
<ns0:Root xmlns:ns0="http://TestXSLT1._0.Inpu1">
<Header>
<SeqNo>1</SeqNo>
<FileName>Test</FileName>
</Header>
<Detail>
<ItemName>Item1</ItemName>
<Quantity>1</Quantity>
</Detail>
<Detail>
<ItemName>Item2</ItemName>
<Quantity>2</Quantity>
</Detail>
</ns0:Root>
</InputMessagePart_0>
<InputMessagePart_1>
<ns0:Root xmlns:ns0="http://TestXSLT1._0.Input2">
<FileName>Test</FileName>
<Header>
<DestinationLocation>Miami</DestinationLocation>
<DestinationName>State</DestinationName>
<Detail>
<ItemName>Item1</ItemName>
<Rate>100</Rate>
</Detail>
<Detail>
<ItemName>Item2</ItemName>
<Rate>200</Rate>
</Detail>
</Header>
</ns0:Root>
</InputMessagePart_1>
</ns0:Root>
Desired OutPut :
<ns0:Root xmlns:ns0="http://TestXSLT1._0.Output">
<SeqNo>1</SeqNo>
<FileName>Test</FileName>
<DestinationLocation>Miami</DestinationLocation>
<DestinationName>State</DestinationName>
<Detail>
<ItemName>Item1</ItemName>
<Quantity>1</Quantity>
</Detail>
<Detail>
<ItemName>Item2</ItemName>
<Quantity>2</Quantity>
</Detail>
<Detail>
<ItemName>Item1</ItemName>
<Rate>100</Rate>
</Detail>
<Detail>
<ItemName>Item2</ItemName>
<Rate>200</Rate>
</Detail>
</ns0:Root>
XSLT I Have started :
<?xml version="1.0" encoding="UTF-16"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:msxsl="urn:schemas-microsoft-com:xslt" xmlns:var="http://schemas.microsoft.com/BizTalk/2003/var" exclude-result-prefixes="msxsl var s2 s0 s1" version="1.0" xmlns:ns0="http://TestXSLT1._0.Output" xmlns:s2="http://schemas.microsoft.com/BizTalk/2003/aggschema" xmlns:s0="http://TestXSLT1._0.Input2" xmlns:s1="http://TestXSLT1._0.Inpu1">
<xsl:output omit-xml-declaration="yes" method="xml" version="1.0" />
<xsl:template match="/">
<xsl:apply-templates select="/s2:Root" />
</xsl:template>
<xsl:template match="/s2:Root">
<ns0:Root>
<SeqNo>
<xsl:value-of select="InputMessagePart_0/s1:Root/Header/SeqNo/text()" />
</SeqNo>
<FileName>
<xsl:value-of select="InputMessagePart_0/s1:Root/Header/FileName/text()" />
</FileName>
<DestinationLocation>
<xsl:value-of select="InputMessagePart_1/s0:Root/Header/DestinationLocation/text()" />
</DestinationLocation>
<DestinationName>
<xsl:value-of select="InputMessagePart_1/s0:Root/Header/DestinationName/text()" />
</DestinationName>
<xsl:for-each select="InputMessagePart_0/s1:Root/Detail">
<Detail>
<ItemName>
<xsl:value-of select="ItemName/text()" />
</ItemName>
<Quantity>
<xsl:value-of select="Quantity/text()" />
</Quantity>
<Rate>
<xsl:value-of select="../../../InputMessagePart_1/s0:Root/Header/Detail/Rate/text()" />
</Rate>
</Detail>
</xsl:for-each>
</ns0:Root>
</xsl:template>
</xsl:stylesheet>
The XSLT I have made doesn't give me the desired output.
This should be done in XSLT 1.0
Appreciate for the help ~

Answer 1

The output you show can be produced using:
XSLT 1.0
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="xml" version="1.0" encoding="UTF-8" indent="yes" omit-xml-declaration="yes"/>
<xsl:template match="/*">
<ns0:Root xmlns:ns0="http://TestXSLT1._0.Output">
<!-- header -->
<SeqNo>
<xsl:value-of select="InputMessagePart_0/*/Header/SeqNo" />
</SeqNo>
<FileName>
<xsl:value-of select="InputMessagePart_0/*/Header/FileName" />
</FileName>
<DestinationLocation>
<xsl:value-of select="InputMessagePart_1/*/Header/DestinationLocation" />
</DestinationLocation>
<DestinationName>
<xsl:value-of select="InputMessagePart_1/*/Header/DestinationName" />
</DestinationName>
<!-- details part 0 -->
<xsl:for-each select="InputMessagePart_0/*/Detail">
<Detail>
<ItemName>
<xsl:value-of select="ItemName" />
</ItemName>
<Quantity>
<xsl:value-of select="Quantity" />
</Quantity>
</Detail>
</xsl:for-each>
<!-- details part 1 -->
<xsl:for-each select="InputMessagePart_1/*/Header/Detail">
<Detail>
<ItemName>
<xsl:value-of select="ItemName" />
</ItemName>
<Rate>
<xsl:value-of select="Rate" />
</Rate>
</Detail>
</xsl:for-each>
</ns0:Root>
</xsl:template>
</xsl:stylesheet>