Auto Download JRE from Intranet using JWS

I'm pretty new to JWS, I want to download a specfic JRE version from my Intranet or from a directory on the Unix server (webserver). I have downloaded 1.4.2_11 from Sun web site to http://webserver01.intra.xyzabc.com:8000/sample. What step I must do to autoload when the user does not have any JRE installed on desktop
please help me.
Thanks
Baski
Sample.jnlp:
<?xml version="1.0" encoding="utf-8"?>

<jnlp
spec="1.0+"
codebase="http://webserver01.intra.xyzabc.com:8000/sample"
href="Hello.jnlp">
<information>
<title>Java Web Start, Sample Program</title>
<vendor>Java Web Start Home Page</vendor>

<description>This is a Sample Program</description>
<offline-allowed/>
</information>
<resources>
<jar href="Sample.jar"/>
<j2se version="1.4.2_11" href="http://webserver01.intra.xyzabc.com:8000/sample"/>
</resources>
<application-desc main-class="Sample"/>
</jnlp>

Note that only certain version are available for
auto-download, and the published list may be
out-of-date (it was the last time I checked.)
(grumble) I'd have thought Sun might be able to get
the technology together to generate the list of available
versions actively (e.g. using JSP/servlets).
There was recently a question why no version
NN available?, my reply linked to the list of
available versions and asked Do you see
your requested version, listed here?
I probably led the questioner entirely astray.

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