Previously i was running into a Error 907 invalid JAR (something about missing trailing bytes whatever that means) when trying to install using the blackberry browser. I was able to install correctly using this method. Once it shows up on your blackberry, click the attachment and choose open. The trick was to download the JAVA-Viewer.jar (located at the box's install link DVRIPaddress:5550/JAVA-Viewer.html) to a computer first, then email it to yourself.
I was trying to install from an EB3004Net SATA+. I was able to get the AverMedia Java Viewer to install on my Blackberry 8900.