XSLT transforming from soap xml to E2B-R2 xml format

I'm splitting a large soap xml file into multiple files then running a
transformation on each file.
I'm left with:

<?xml version="1.0" encoding="UTF-8"?>
<ichicsr xmlns="urn:enterprise.soap.sforce.com"
         xmlns:sf="urn:sobject.enterprise.soap.sforce.com"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         lang="en">
........
.........
</ichicsr>

What I want to end up with is like:
<xmlFile>
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE ichicsr SYSTEM
"http://eudravigilance.ema.europa.eu/dtd/icsr21xml.dtd">

.................
..............

    </ichicsr>
</xmlFile>



Then

Phil Legault
RDx Platform Lead