Java SE (Java Platform, Standard Edition)

Hi,
in one of our applications we need to analyze the Java heap of some slow application.The application would be launched on Java webstart running on JDk 1.5 update 22.
I could not find a way to generate heap dump on this.As the java-vm-args option on JDK/JRE 1.5 supports limited VM options:
http://download.oracle.com/javase/1,5.0/docs/guide/javaws/developersguide/syntax.html
Also the option of downloading jnlp and running it through command-line (http://stackoverflow.com/questions/4663736/java-webstart-heap-dump) is also not a practical option as the application runs on customer site.

Is there any other way to do so as I could not find on web.

Help in this regard would be appreciated.

Thanks and sorry if this question is already answered in some other thread...