If you are using OTA files then there won’t be much trouble installing it as you can use your Blackberry Desktop Software for such files but if you are using non-OTA files then the procedure is little different. Follow the simple steps given below to install .jar files in your blackberry phone. This method works for all Blackberry Bold models and few other models.
Download .JAR file to your PC
Connect your Blackberry to your PC via USB cable.
Copy the .jar file which you want to install.
Open “My Computer”
Find your BlackBerry device in the list of drives.
Paste the file either into the root of Blackberry or in a subfolder.
Unhook...