Replacing values in one xml file from another xml file

HI,
 
I have two xml files.... 

************* 1 ***************
<?xml version="1.0" encoding="UTF-8"?>
<wikimedia>
<!--><xsi:noNamespaceSchemaLocation="Inclusion.xsd">-->
<projects>
<project name="Wikipedia" launch="2001-01-05">
<editions>
<edition language="English">p1</edition>
<edition language="German">de.wikipedia.org</edition>
<edition language="French">fr.wikipedia.org</edition>
<edition language="Polish">en.wikipedia.org</edition>
</editions>
</project>
<project name="Wiktionary" launch="2002-12-12">
<editions>
<edition language="English">en.wiktionary.org</edition>
<edition language="French">fr.wiktionary.org</edition>
<edition language="Vietnamese">vi.wiktionary.org</edition>
<edition language="Turkish">tr.wiktionary.org</edition>
</editions>
</project>
</projects>
</wikimedia>

************end of 1****************

and 

*****************2****************

<?xml version="1.0" encoding="UTF-8"?>
<chapter>
<p id="p1">text</p>
</chapter>

*********end of 2****************

If you see the 1 st xml file

At the node wikimedia\ projects\ project\ editions\ edition
language="English" in the place of p1. I should get value from the second
xml file ----- chapter\<p id="p1"> "text".

When I run an xslt and get the data from 1st xml in the place of p1. I
should get text displayed..
I mean it should be linked to the chapter\<p id="p1"> "text". Field of
source.xml..
please let me know how to do this.....

 
Thanks & Regards,

Mujahid E Azam