if you have a media card,plug your berry into the computer and enable mass storage mode. open the folder for the drive that is your berry, and drag and drop the file to your berry.
oh i got it. for anyone else with this problem, without your phone in mass storage mode, go to your media file, hit the "more" button, hit explore, media card, and go to desktop. exit out of that, put your phone back into the computer, and now when you open the blackberry drive, it will have a new folder labeled desktop. drag and drop the .jar in this file, unplug your phone and go back to the desktop file on your phone.