It is simple to load a BlackBerry application packaged as cod file to your device using JavaLoader.exe. With JavaLoader, you do not have to install the desktop manager if you just want to have an ability to quickly load applications to your blackberry
JavaLoader.exe -u=USB load path_to_your_cod_file
command and you should be all setIt is easier if you have the JavaLoader and the COD files in the same dir because then the command is simply
JavaLoader.exe -u=USB load path_to_your_cod_file
UPDATE: The JavaLoader command will not work if you don't have the BlackBerry desktop manager installed. You will get an error that the port can not be open.