Java SE (Java Platform, Standard Edition)

I'd like to require that users of our app are running jre1.5.0_05, which includes a bug fix that we'd like to incorporate in our app. I've tried to request that version via the <j2se> tag, but apparently its not available (nor is _04, or _03).

<j2se version="1.5.0_05" href="http://java.sun.com/products/autodl/j2se"/>

I've tried "1.5.0_05-05b" (the string returned from java -fullversion), as well as "1.5.0_04" and "_03". If I only specifiy 1.5.0, I seem to get 1.5.0_02.

Is there a way to automatically download a later version of the jre? Do I need to write my own download handler? Is there a way to see a list of the available jres at the sun autodl url?

Thanks,

Paul Christmann