JNLP file version based update like Jar files version?

Dear All,
We are using the JWS from the past one year. Its working fine except one or two issues.
Here i am explaining one of those issues:
When user double clicks the icon on his desktop, first the JWS checks for updates. If updates found it will download the updates and starts the application.
JWS doing the updates checking as:
First its checking the time stamps of the client and server JNLP files. If server JNLP file time stamp is grater than client JNLP file time stamp, then its checks for each and every jar file update.
For Jar files update we are using the version based. Our JNLP file is as shown below:
<jnlp spec="1.0" codebase="$$codebase" href="LaunchMedplexus.jnlp">
<information>
<title>CBST</title>
<vendor>CBST</vendor>
<description kind="short">CBST</description>
<icon href="../../../../images/image1.gif" kind="splash"/>
<icon href="../../../../images/image1.jpg"/>
<offline-allowed/>
</information>
<security>
<all-permissions/>
</security>
<resources>
<j2se version="1.4" initial-heap-size="48m" max-heap-size="256m"/>
<jar href="../../../../JARS/AppJars/POMS/admin/admin.jar"      version="7.7.0.0" />
<jar href="../../../../JARS/AppJars/POMS/billing/bil_adj.jar"      version="7.7.0.0" />
</resources>
<application-desc main-class="com.test.security.Login">
</application-desc>
</jnlp>
we are facing the problems because JWS updates checking is based on the JNLP file time stamp.
is there is any way in JWS to check the updates based on JNLP file version instead of timestamp (like jars version based)?
Our Environment is :
JRE : 1.4.2_10
OS : Windows 2000/XP
thanks in adavance
Krishna Mohan.

Dear Andy,
Thank You for your reply.
perhaps you can use a simple jnlp file that referre to almost all of the application using a versioned jnlp component extension.can you explain this line little more elaborately.
thanks in advance
km

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