Everything I know about the Java Emulator is what I wrote in this guide on how to install Opera Mini 4. Assuming that you are running the same IBM Java Emulator that I was then you would do the following:- Open File Manager.
- Browse to \J9\MIDP20\bin.
- Open emulator.exe.
- Press install.
- The URL you want to enter is: (location and name of jad file).
To install the Opera Mini application I pointed it to a URL but I've heard that you can point it to a file if you want. For example \Storage Card\Pacman.jad.
I hope that helps.