- Then compresses it this way by going to menu and then compress .zip. Keep pressing yes until it says "compression done succesfully".

For example, if you have compressed class files as mini.zip then rename it to mini_jar by blueftp.

Scroll to this file via your phone's gallery and select options, rename, and change _ to . i.e, mini_jar to mini.jar .
Note that s40 users could do this only by their phone's gallery. But other phone system users could rename .zip to .jar directly by blueftp .

9. Finally the .jar renamed application will be recognized by your phone and run the application. If everything is perfect and if you have added your trick correctly, it will work. Then enjoy the application modded by yourself.Your queries, suggestions and problems are always welcome.