Windows XP

I have a jnlp of a webstart program that currently downloads jar files and executes them I think. I want to instead have it use a file stored locally on a computer. Here is the syntax

Code:
<?xml version="1.0" encoding="UTF-8"?>
<jnlp codebase="http://ha.gen.school.edu:80/" href="http://ha.gen.school.edu:80/Sample.jnlp">
        <information>
                <title>Sample Set</title>
                <vendor>Some School</vendor>
                <description>Tools for Analysis.</description>
        </information>
        <resources>
                <j2se version="1.4+" initial-heap-size="128m" max-heap-size ="1024m"/>
                <jar href="./jar/Core.jar"/> //Want to modify this to use a jar file on the computer
                <jar href="./jar/commons-codec-1.3.jar"/>
                <jar href="./jar/commons-httpclient-3.1.jar"/>
                <jar href="./jar/commons-logging-1.1.1.jar"/>
        </resources>
        <application-desc main-class="CoreClass">
                <argument>http://ha.gen.school.edu:80/cgi-bin/sample.cgi</argument>
                <argument>normal</argument>
                <argument>newCoreSearch</argument>
        </application-desc>
        <security>
                <all-permissions/>
        </security>
</jnlp>
How would I modify the noted line to use a local jar file? Thanks