In such a scenario, the zipped folder will contain the installation files for the app so don’t fret. The complete folder should consist of .cod files and either a .jad or a .alx file (sometimes, both .jad and .alx files are in the .zip / .rar file).
To begin installation, extract the folder or files in the .zip / .rar file and place them in a folder.
How to install a Blackberry app using a .jad file
If the folder contains a .jad file, all you need do in order to install is to:
Send the folder to your Blackberry using your BB cord
Navigate to this folder location on your Blackberry then open it
Click the .jad file.
You’ll be prompted to begin download, click yes.
Installation should auto-begin and complete
How to install a Blackberry app using a using a .alx file
If a .alx file is present instead, then you need to:
Download Blackberry Desktop Software
connect your Blackberry and wait till the desktop software recognizes your Blackberry.
Click Application and wait for all the apps installed on your Blackberry to get listed
click on ‘import fies’ and navigate to the .alx file then select it
Your Blackberry might reboot.