Remember, BBOS does not endorse pirating apps, if you use a software like this, please do responsibly.
If the jad url is available for an user, it's really easy to dowload the cod files because all is described in the jad file.
So if the user share the jad file and the app isn't free, it's his own responsability.
I created GMYJ for download free application which didn't give a zip format to download. I haven't data plan and my storm hasn't wifi connection. So use my application is the only way to install apps on my bb.
I do not endorse pirating apps.
Also, the .jad file isn't for use with DM, you just put all the .cod files and the .jad file in a folder on your blackberry, browse to it, and click on it, then press download (it doesn't really download it, as it is in the folder, but it installs it)