I found a way to download games on a simulated pearl and save them to your pc so you can install through app loader in DM:
Or you can create .cod files from .jar and .jad files and install with javaloader:
There is even someone who posted a bat file that will create the .alx file for a .cod file. I haven't tried that, but maybe it works.
I find the method with the simulator to work the best. Hope this helps and good luck.